Consequently, the dye's contact time in the 100.00 ml. was 0.171 M.
What is a solutions in the context of chemistry?A homogenous mix comprising two or more parts with particles less than 1 nm is referred to as a solution. Solutions can take various forms, including soda water, salt and sugar solutions, and others.
Let's name the initial solution's percentage "C1."
The intensity of the reaction solution is when 2.00 ml of initial sample is moved to a 100.00 ml of volumetric flask to 100.00 with water.
(2.00 ml) / (100.00 ml + 2.00 ml) * C1 =
0.0195 * C1.
When 5.00 ml of this solution is then diluted to 100.00 ml, the concentration of the final solution is
(5.00 ml) / (100.00 ml + 5.00 ml) * (0.0195 * C1) =
0.0476 * 0.0195 * C1 =
0.000158 M.
So, we can find the original concentration, C1, by rearranging the above equation:
C1 = (0.000158 M) / (0.0476 * 0.0195)
= 0.000158 M / 0.000913
= 0.171 M.
To know more about solution visit:
https://brainly.com/question/29015830
#SPJ4
olubility is select one: a. the amount of solute that will dissolve in a given amount of solvent, regardless of temperature b. the amount of solvent that will dissolve a given amount of a solute at any temperature c. the process of dissolving a solute in a solvent d. the amount of solute that will dissolve in a given amount of solvent at a certain temperature
A quality known as solubility describes a substance's capacity to dissolve in a solvent. It is limited in terms of the maximum amount of solute that may be balanced dissolved in a solvent.
What is a solubility?
The ability of a material, the solute, to combine with another substance, the solvent, is known as solubility in chemistry. Insolubility, or the solute's inability to create such a solution, is the opposite attribute.
The concentration of the solute in a saturated solution—a solution in which no more solute can be dissolved—is typically used to gauge the degree of a substance's solubility in a particular solvent. The two compounds are said to be at the solubility equilibrium at this time. There might not be a limit for some solutes and solvents, in which case the two are referred to as "miscible in any quantities."
To learn more about solubility visit;
https://brainly.com/question/28170449
#SPJ4
If you have 1.0 moles of each compound, which will have the greater mass?
A. NBr3
B. H3PO4
C. Fel3 D.KF
NBr3 has the highest mass due to its greatest molecular mass. Therefore, option (a) is correct.
What is the molecular mass?The molecular mass is calculated by summing the atomic masses of all the atoms in the molecule. Find each element's atomic mass using the mass stated in the Periodic Table.
The molecular mass of NBr3 is:
1 x 14.01 g/mol (for nitrogen) + 3 x 80.92 g/mol (for bromine) = 227.75 g/mol
The molecular mass of H3PO4 is:
3 x 1.01 g/mol (for hydrogen) + 1 x 31.97 g/mol (for phosphorus) + 4 x 16.00 g/mol (for oxygen) = 97.98 g/mol
The molecular mass of FeCl3 is:
1 x 55.85 g/mol (for iron) + 3 x 35.45 g/mol (for chlorine) = 126.80 g/mol
The molecular mass of KF is:
1 x 39.10 g/mol (for potassium) + 1 x 19.00 g/mol (for fluorine) = 58.10 g/mol
Therefore, NBr3 has the greatest molecular mass.
To know more about molecular mass visit :
https://brainly.com/question/18446366
#SPJ4
in what category are the eicosanoids, based on chemical structure?
Eicosanoids are a subclass of oxylipins, which are oxidized fatty acids with a variety of carbon unit lengths. They differ from many other oxylipins by having a disproportionately large role as cells signaling molecules.
What exactly is eicosanoids and what tasks do they do?The lipid-based signaling molecules known as eicosanoids have a special function in innate immune responses. The many eicosanoids, including prostaglandins and leukotrienes, enable the immune cell cells to react to bacterial intruders quickly.
What kinds of substances are eicosanoids?The hormones (PG), thrombin (TX), thromboxanes (LT), and lipoxins are eicosanoids (LX). These substances can be categorized as autocrine/paracrine hormones because they virtually invariably affect the cells that make them or nearby cells, i.e., over small distances and times.
To know more about Eicosanoids visit:
https://brainly.com/question/16009263
#SPJ4
what is true about polysaccharides? group of answer choices polysaccharides cannot be branched. the hydroxyl groups of polysaccharides cannot be modified, they only are able to participate in hydrogen bonding. if a covalent glycosidic bond forms at the anomeric carbon, then the structure is fixed and the bond can be labeled alpha or beta. polysaccharides are much shorter than oligosaccharides. polysaccharides are formed between straight-chain forms of monosaccharides
The true statement about polysaccharides is ,"if a covalent glycosidic bond forms at the anomeric carbon, then the structure is fixed and the bond can be labeled alpha or beta".
Polysaccharides are defined as large molecules that are made up of many monosaccharides and disaccharides linked together with the help of glycosidic bonds.
These polysaccharides are macromolecules or polymers because they are made up of a large number of monomers (poly means many).
In these molecules, the joining bond is a covalent bond called the glycosidic bond. It is formed between the anomeric carbon (C1) of one monomer with the carbon (C4 or C6) of another monomer.
Once this bond is formed, the two monomers are said to be linked together.
The formation of this bond is an example of a condensation reaction or dehydration synthesis because a water molecule is released.
This bond is labeled as an alpha bond if it is directed towards the upside of the anomeric carbon and it is labeled as beta if this direction is towards the downside of the anomeric carbon. Hence, option B is correct.
Learn more about polysaccharides from the link given below.
https://brainly.com/question/780562
#SPJ4
a 25.00 ml solution containing 0.035 m sodium acetate is titrated with a 0.098 m solution of hcl. how many milliliters of hcl are required to reach the endpoint? type answer:
The quantity of HCl needed to attain the endpoint is 8.92 mL.
Considering the query,
We need to figure out how much HCl is needed to attain the goal.
We will first create a chemical equation for the reaction that is balanced.
The reaction's equilibrium chemical equation is
CH₃COONa + HCl → CH₃COOH + NaCl
This implies
It takes 1 mole of sodium acetate to neutralise 1 mole of HCl fully.
We shall now count the moles of sodium acetate that are present.
Using the equation
Number of moles = Volume Concentration
sodium acetate concentration = 0.035 M
sodium acetate volume = 25.00 mL = 0.025 L
The amount of sodium acetate present is 0.035 0.025 moles.
There are 0.000875 moles of sodium acetate present.
Now,
Since it takes 1 mole of sodium acetate to neutralise 1 mole of HCl
Then,
It would take 0.000875 moles of sodium acetate to completely neutralise 0.000875 moles of HCl.
∴ The required amount of HCl is 0.000875 moles.
The volume of 0.098 M HCl needed to attain the endpoint is next.
Using the equation:
[tex]volume=\frac{number.of moles}{concentration}[/tex]
The amount of HCl needed to attain the endpoint is=[tex]\frac{0.000875}{0.098}[/tex]
The amount of HCl needed to attain the endpoint is 0.00892857143L.
8.92857143 mL of HCl are needed to achieve the goal.
8.92 mL of HCl are necessary to attain the goal.
Consequently, 8.92 ml of HCl are needed to attain the goal.
learn more about Concentration Refer:brainly.com/question/10720472
#SPJ4
water is a liquid at room temperature. this is due to
At ambient temperature, water is a liquid because of the strong hydrogen bond that forms between the H and O of neighboring water molecules and the close packing of the water molecules.
At room temperature, what causes water to be a liquid?between the molecules of water, hydrogen bonds. At temperatures normally seen on the surface of the Earth, including ambient temperature, hydrogen bonds between the molecules of water keep water in a liquid form.
Is hydrogen bonding in water what causes it to be liquid at ambient temperature?Since the nearby hydrogen atoms are partly positive species and have high electronegativity, they can only form a weak hydrogen bond with the oxygen atom in water. D is the right answer, thus. cohesive forces caused by water's hydrogen bonds.
to know more about temperature here:
brainly.com/question/11384928
#SPJ4
Since you can write a balanced chemical equation, you can also utilize your stoichiometry for these neutralization reactions. You mix 1 mole of HNO3 with 1 mole of NaOH in enough water to make 1 L of solution. What do you expect the final pH of the solution to be? Hint: Think about what is in your beaker after the reaction has run to completion: 1) Is there any of the original acid left?2) Is there any of the original base left? 3) Do you expect any of your products to act as an acid or a base? A. pH < 7 B. pH > 7 C. pH = 7
The PH of the solution will be equal to 7 as the reaction of hydrogen bromide and nitric acid is a neutralization reaction.
i[tex]HNO_{3}+NaOH[/tex]⇒[tex]NaNO_{3} + H_{2} O[/tex]this reaction, sodium hydroxide, a base, reacts with nitric acid, an acid, to produce sodium nitrate, a salt, and water. As a result, it is aa neutraneutralizationneutraneutralizationlizationlization reactionreactiona . As a result, nitric acid acts as an acid in the reaction.
Sodium hydroxide reacts with nitric acid to form sodium nitrate salt and water, according to the given equation. This is an illustration of a neutralisation reaction.
Nitric acid is a one normal solution, which means that for every mole of [tex]HNO_{3}[/tex], one mole of [tex]H^{+}[/tex] or acid is liberated, which must be neutralised with one mole of hydroxide [tex]OH^{-}[/tex] . All pH neutralisation reactions are exothermic, which means that heat is produced.
go through the given link below to know more about neutralisationnneutralisationeutralisationgo reaction:-
https://brainly.com/question/23008798
#SPJ4
Aldehydes have a central carbon bound to two other carbons true false
False. There isn't always a core carbon bonded to two additional carbons in aldehydes.
What are carbon bonds?Chemical bonds between carbon atoms are referred to as carbon bonds. Carbon atoms can create up to four covalent bonds with other atoms, including hydrogen, oxygen, nitrogen, sulphur, and other carbon atoms, and they have four valence electrons.
An organic substance classified as an aldehyde has a carbonyl functional group (C=O) at the end of the carbon chain. This functional group is denoted by the symbol -CHO and consists of a carbon atom double-bonded to an oxygen atom. From straightforward one-carbon aldehydes like formaldehyde to longer chain aldehydes with multiple carbon atoms, aldehydes can have a variety of carbon chain lengths.
However, the presence of the carbonyl functional group, not the quantity or configuration of other carbon atoms, is what distinguishes an aldehyde from other organic compounds.
To know more about carbon bonds, visit:
https://brainly.com/question/865856
#SPJ4
3. which of the following is not true about the molecular ion in mass spectrometry? a) the molecular ion is produced by loss of one electron from the molecule. b) the mass of the molecular ion is equivalent to the mass of the molecule. c) the ion is produced by a loss of a pair of electrons from the molecule. d) the molecular ion is often unstable and can undergo fragmentation. e) none of these
a) the molecular ion is produced by the loss of one electron from the molecule is not true. The molecular ion is produced by the loss of a pair of electrons from the molecule, making it a positive ion. This process is known as electron ionization.
Key points:
Mass spectrometry is a technique used to determine the mass of a molecule and its fragments.The first step in mass spectrometry is the ionization of the molecule, which involves removing one or more electrons to create ions.The most common type of ionization in mass spectrometry is electron ionization, which involves removing a pair of electrons to create a positive ion. This positive ion is known as the molecular ion.The mass of the molecular ion is equivalent to the mass of the molecule.The molecular ion is often unstable and can undergo fragmentation. This fragmentation process provides information about the structure of the molecule.Learn more about mass spectrometry here:
https://brainly.com/question/5044183
#SPJ4
A competitive inhibitor of an enzyme is usually:A. a highly reactive compound.B. a metal ion such as Hg2+ or Pb2+.C. structurally similar to the substrate.D. water insoluble.E. a poison.
Typically, the substrate and a competitive enzyme inhibitor share structural similarities. The right answer is C).
What is an enzyme's straightforward definition?A specific kind of biological catalyst called an enzyme is almost always a protein. It quickens a certain chemical reaction inside the cell. The enzyme is continuously employed during the process and is not destroyed.
What are the roles played by enzymes?Enzymes assist in speeding chemical reactions inside the human body. Among many other functions, they are crucial for breathing, food digestion, and the health of the muscles and nerves .Each cell in the human body has a variety of enzymes. Each cell's internal chemical operations can be aided by enzymes.
To know more about Enzyme visit :
https://brainly.com/question/14953274
#SPJ4
if an antacid tablet is initially dissolved in 50.0 ml of 0.10 m hcl and it needs 12.5 ml of 0.10 m naoh to reach the endpoint of the titration, how many moles of hcl were neutralized by the antacid tablet?
HCl were neutralized by the antacid tablet at [tex]3.75 moles.[/tex]
Stomach ulcers, bloating, and acid reflux are all conditions that are treated with antacid tablets. By easing symptoms like gastrointestinal discomfort or irritability, it aids. Additionally, it aids in balancing and letting go of extra gas in the stomach.Titration is a typical laboratory technique for quantitative chemical analysis used to calculate the concentration of a specified analyte. A standard solution with a defined concentration and volume is created as the reagent, also known as the titrant or titrator.
The formula: may be used to figure out how many moles of HCl the antacid pill neutralised:
[tex]Moles HCl = (volume HCl x molarity HCl) - (volume NaOH x molarity NaOH)\\Moles HCl = (50.0 mL x 0.10 mol/L) - (12.5 mL x 0.10 mol/L)\\Moles HCl = 5.0 - 1.25\\Moles HCl = 3.75 mol[/tex]
[tex]3.75 mol[/tex] of hcl were neutralized by the antacid tablet.
learn more about antacid tablet Refer:brainly.com/question/13803795
#SPJ4
the trigylceride (c57h110o6) content of a blood sample is 125 mg in 10.0 ml. what is the molarity of the trigylceride?
0.19 mM is the molarity of the triglyceride , the trigylceride (c57h110o6) content of a blood sample is 125 mg in 10.0 ml
The molarity of the triglyceride in the blood sample is 0.19 mM.
To find the molarity, the mass of the triglyceride (125 mg) must be converted to moles.
Then divided by the volume of the blood sample (10.0 mL).
The conversion factor is obtained by dividing the molar mass of the triglyceride (862 g/mol) by 1000 to convert to milligrams:
125 mg / (862 g/mol / 1000) = 0.145 x 10^-3 mol
The molarity is then calculated as:
0.145 x 10^-3 mol / 10.0 mL = 0.19 mM
The trigylceride (c57h110o6) content of a blood sample is 125 mg in 10.0 ml, 0.19 mM is the molarity of the triglyceride ,
Learn more about triglyceride here:
https://brainly.com/question/13840067
#SPJ4
the heat capacity of the calorimeter is the amount of heat necessary to raise the temperature of the apparatus (the cups and the stopper) by 1 k . calculate the heat capacity of the calorimeter in j/k .
The heat capacity of the calorimeter is the amount of heat necessary to raise the temperature of the apparatus (the cups and the stopper) by 1 K.
To calculate the heat capacity of the calorimeter in J/K , you need to know the mass of the apparatus and the specific heat of the material used in the apparatus. The heat capacity is then calculated by multiplying the mass of the apparatus by the specific heat of the material and the change in temperature (1 K).
For example, if the mass of the apparatus is 200 g and the specific heat of the material is 0.75 J/gK, the heat capacity of the calorimeter is 150 J/K.
Learn more about the heat capacity of the calorimeter:
https://brainly.com/question/30388407
#SPJ4
A fossilized egg from an extinct species of dinosaur has been discovered. One scientists claims that using C-14 dating methods can easily determine the approximate age of the fossil. Which statement correctly supports or refutes this claim? Responses A This claim is accepted because all living organisms contain carbon.This claim is accepted because all living organisms contain carbon. B This claim is refuted because C-14 dating cannot be used for fossils over 100,000 years old since it has a relatively short half-life.This claim is refuted because C-14 dating cannot be used for fossils over 100,000 years old since it has a relatively short half-life. C This claim is refuted because C-14 can only be used for living organisms, and the fossil of the egg is nonliving.This claim is refuted because C-14 can only be used for living organisms, and the fossil of the egg is nonliving. D This claim is accepted because dinosaurs have been extinct for less than one million years, indicating that enough of the C-14 is left in th
The half life of carbon -14 is 5730 years that is very small time compared to the age of dinosaurs. Therefore, This claim is refuted because C-14 dating cannot be used for fossils over 100,000 years old since it has a relatively short half-life.
What is carbon -dating ?There are many radioactive isotopes of elements which undergo nuclear decay by the emission of charged particles such as alpha or beta. Nuclear decay is a first order reaction and the time of decay can be determine if the half life of the isotope is known.
Half life of a radioactive isotope is the time for the decay of half of the initial amount of the sample. Carbon -14 is a radioactive isotope of carbon with a half life of 5730 years.
Dinosaurs were lived in the earth about 100 -50 million years ago. Therefore, carbon -14 is not at all sufficient to determine the age of fossils of dinosaurs. Hence, option B is correct.
Find more on carbon dating:
https://brainly.com/question/14640107
#SPJ1
the atomic mass of nitrogen is 14 g/mol. the atomic mass of hydrogen is 1 g/mol. when the reaction produces 68 grams of ammonia, how many grams of nitrogen were present initially?
When the reaction creates 68 grams of ammonia from 56 grams of nitrogen in the beginning.
When nitrogen has an atomic mass of 14, how much heavier would ammonia molecules be?Since there are 3 hydrogen atoms and 1 nitrogen atom in ammonia (NH3), we may calculate nitrogen's atomic mass by adding the molar masses of the two atoms. In this case, nitrogen weighs 14 and hydrogen, 3x1=3, making 14+3=17g.
With an atomic mass of 14, how many additional electrons are required for a nitrogen atom to have its outermost electron shell complete?Since each nitrogen atom needs three electrons to fill its outermost shell, nitrogen atoms will establish three covalent bonds (also known as triple covalent) between two nitrogen atoms.
To know more about ammonia visit :-
https://brainly.com/question/4828133
#SPJ4
how many electrons can cobalt lend or borrow
As a result, compared to a proton or neutron, an electron is thought to be almost massless. Therefore, cobalt can loose 3 electrons to become Co³⁺.
What is electron?The electron is the lightest known stable subatomic particle. It has a negative charge that is equivalent to 1.602176634 coulombs, which is regarded as the fundamental building block of electric charge.
9.1093837015 ×10³¹ kg, or just 1/1,836 the mass of a proton, is the rest mass of an electron. As a result, compared to a proton or neutron, an electron is thought to be almost massless, and its matter is not taken into account when determining an atom's mass number. Cobalt can loose 3 electrons to become Co³⁺.
Therefore, cobalt can loose 3 electrons to become Co³⁺.
To know more about electron, here:
https://brainly.com/question/17066934
#SPJ1
Cobalt is a transition metal . Hence, it can show variable oxidation state. It contains 9 valence electrons. It can lend 1, 2 or 3 electrons. As an electropositive element cobalt do not borrow electrons from other atoms.
What is cobalt ?Cobalt is 27th element in periodic table. It is located in d-block of the table and it is a transition metal. The significant feature of transition metal is that, all of them exhibit a variable oxidation state.
Cobalt contains 27 electrons and out of which 9 are valence electrons in 4s and 3d orbitals. These can be participated in bonding. Cobalt can donates its 1 or two valence electrons from the 4s orbital.
Similarly it can donate one electron from the 3d orbital as well. Therefore, the most common oxidation states of Co are +1, +2, and +3. Cobalt does not borrow electrons from other atoms since it is an electropositive element.
Find more on cobalt :
https://brainly.com/question/1549014
#SPJ1
What happens to the speed of particles as you change the temperature in the module?
The speed of particles changes as you change the temperature in the module.
When the temperature is increased, the speed of the particles increases, but when the temperature is decreased, the speed of the particles decreases.
What is the relationship between temperature and the speed of particles?The temperature and the speed of particles are directly related to each other.
When the temperature of a substance is increased by the addition of heat, the speed of the particles will increase as a result of the increase in the kinetic energy of the particles.
However, when the temperature of a substance is decreased by the removal of heat, the speed of the particles will decrease as a result of the decrease in the kinetic energy of the particles.
Learn more about the temperature and speed of particles at: https://brainly.com/question/26438248
#SPJ1
as you move across a period, you will recall that the radius decreases. why do you think a decrease in atomic radius would result in a greater ionization energy?
The positive nuclear charge requires more ionization energy due to the electrons' increased distance from it due to the smaller radius.
Why do you suppose a bigger atomic radius would have a bigger ionization energy?Generally speaking, the easier it is for an electron to be evacuated, the farther it is from the nucleus. The amount of energy needed to remove the electron from the outermost orbital decreases with increasing atomic radius; this is known as the ionization energy function.
What causes the ionization to diminish with time?Ionization energy drops off within a group. The outer electrons are less securely confined because they are further from the nucleus.
To know more about ionization energy visit :-
https://brainly.com/question/28385102
#SPJ4
True or False. Orbitals are a delocalized cloud of electron density.
False. A delocalized cloud containing electron density makes up orbitals. An electron from the valence band or ion that would be delocalized is one that is not bound to another atom a covalent bond.
How do covalent bonds work?A covalent bond is formed when two atoms exchange one or more sets of electrons. The two protons and neutrons are concurrently drawing these electrons to them. When there is a difference in the ionization energy of two atoms, a covalent connection is created.
What three kinds of covalent bonding are there?Single hydrogen bonding, double hydrogen bonding, and triple side chains are the three varieties of covalent bonds. One sigma and one pi link make up a double covalent bond, while two pi but one sigma binding make up a triple covalent bond.
To know more about covalent bond visit:
https://brainly.com/question/25150590
#SPJ4
a solution of 1.00 g of the enzyme in 60.0 ml of benzene has an osmotic pressure of 8.95 mm hg at 27oc. what is the molecular weight of the enzyme?
The molecular weight of the enzyme is approximately 60,800 g/mol.
The osmotic pressure of a solution can be related to the concentration of solute particles in the solution, and the molecular weight of a solute can be related to its concentration and the osmotic pressure of a solution.
The formula for osmotic pressure is given by:
Π = MRT
where Π is the osmotic pressure (in mm Hg),
M is the molar concentration of solute particles, R is the gas constant
([tex]0.0821 L \ atm K^{-1} mol^{-1}[/tex]), T is the temperature in
kelvins (27 °C = 27 + 273.15 = 300 K),
and M is the molecular weight of the solute.
Rearranging the equation to solve for M:
M = Π / (RT)
Substituting the given values:
M = 8.95 mm Hg / ([tex]0.0821 L \ atm K^{-1} mol^{-1}[/tex] [tex]\times 300K[/tex])
M = 8.95 * 10^-3 atm / (0.0821 * 300)
M = 8.95 * 10^-3 atm / 24.63
M = 0.000365 mol/L
To convert molar concentration to weight/volume, we need to divide by the number of moles of solute per liter:
0.000365 mol/L = 0.000365 * M / 1000 g/L
Therefore,
M = 0.000365 * M / 1000
M = 0.365 g/L
Finally, we need to divide by the volume of the solution to get the weight/volume concentration:
0.365 g/L = 0.365 g / 60.0 mL
=> 0.00608 g/mL
To learn more about Molecular weight :
https://brainly.com/question/11910892
#SPJ4
black coffee has a ph of about 5, and orange juice has a ph of about 3. how big is the difference in acidity between these two common drinks?
Black coffee has the pH of about 5, and the orange juice has the pH of about 3. The orange juice is 100 time more acidic than the black coffee.
For the orange juice :
pH = - log [H⁺]
3 = - log [H⁺]
-3 = log [H⁺]
[H⁺] = 0.001 M
For coffee:
pH of coffee = 5
The Hydrogen ion concentration [H⁺] = ?
pH = - log [H⁺]
5 = - log [H⁺]
-5 = log [H⁺]
[H⁺] = 0.00001 M
[H⁺] for orange juice / [H⁺] for coffee = 0.001 / 0.00001
[H⁺] for orange juice / [H⁺] for coffee = 100
This means that the orange juice is 100 times more acidic than the black coffee.
To learn more about pH here
https://brainly.com/question/30438213
#SPJ4
you mix 2 moles of hbr with 3 moles of koh in enough water to make 1 l of solution. how much kbr do you expect to make?
2 moles of KBr are created when two moles of HBr and 3 moles of KOH are combined with just enough water to produce one liter of solution.
Describe a mole.The amount of a substance that consists of 6.022 X 1023 of its component parts, such as particles, atoms, ions, molecules, etc., is called a mole. A mole is the measurement unit for measuring atoms, molecules, or ions.
According to the balanced chemical reaction for the reaction among HBr and KOH:
HBr + KOH → KBr + H2O
1 mole of HBr interacts with 1 mol of KOH to produce one mole of KBr, as can be seen. As a result, if 2 mole of HBr and 3 moles of KOH are combined, the entire HBr will react while just 2 moles of KOH are used. As a result, you can anticipate producing Two moles of KBr.
To know more about mole visit :
https://brainly.com/question/28234357
#SPJ4
a se atom has a mass number of 78 . determine the number of neutrons, protons, and electrons in this neutral isotope.
A Se atom with a mass number of 78 has 34 neutrons, 34 protons, and 34 electrons.
The mass number of an isotope is the sum of the number of protons and neutrons in its nucleus. The number of electrons in a neutral atom is equal to the number of protons.
The number of neutrons in a Se atom with a mass number of 78 can be calculated as follows:
Number of neutrons = Mass number - Number of protons
Since the atomic number of Se is 34, the number of protons in the Se atom is 34. Therefore:
Number of neutrons = 78 - 34 = 44
Therefore, a Se atom with a mass number of 78 has 34 protons, 44 neutrons, and 34 electrons.
Learn more about electrons here:
https://brainly.com/question/1255220
#SPJ4
provide an acidic or basic environment to optimize digestion is meaning of?
Optimizing digestion by creating a acidic or a basic environment entails changing the digestive system's pH to the level most conducive to the rapid food's breakdown into its constituent molecules.
What does a molecule mean in general terms?The smallest recognizable unit that a pure substance may be divided while retaining its structure and chemical properties is a molecule, which is a collection of two or more atoms.
How do molecules differ from atoms?Single, neutral particles make up an atom. As neutral objects consisting of 2 or more atoms joined together, molecules are. A positively charged or negatively charged particles are called ions.
To know more about molecule visit :
https://brainly.com/question/28094389
#SPJ4
the covalent bonds linking distant cysteine amino acid residues in protien tertiary structures is ?
A protein's main building blocks are amino acid residues connected through covalent peptide bonds. The preservation of tertiary structure is aided by covalent disulphide bridges (-S-S-), which connect cysteine residues.
What are some instances of covalent bonding?The exchanging of electron pair between atoms occurs in covalent bonds. In contrast to polar covalent bonds, which are formed when electrons are exchanged between atoms with uneven electronegativity, orbitals shared between atoms with equal or very comparable electronegativity form nonpolar covalent bonds, such as H-H or C-H. (e.g., H–O).
What distinguishes ionic from covalent bonds?Covalent and ionic bonds are the two basic types of bonds that an atom may form with other atoms. The exchange of electrons amongst two or more elements forms a covalent connection.
To know more about Covalent Bonds visit :
https://brainly.com/question/10777799
#SPJ4
you need to determine the mass of an aqueous solution. you determine the mass of your 10.0 ml graduated cylinder to be 23.176 g. after adding a volume of 3.29 ml of solution to the cylinder, you reweigh it and determine the new mass to be 26.451g. what is the mass of the aqueous solution in grams?
The mass of the aqueous solution that is added to the graduated cylinder was found to be 3.275 g.
The volume of the graduated cylinder = 10.0 mL
Volume of aqueous solution added to the cylinder = 3.29 mL
The initial mass of the graduated cylinder = 23.176 g
The mass of the graduated cylinder after aqueous solution was added or final mass = 26.451 g
In order to find the mass of the aqueous solution only, the initial weight of the graduated cylinder has to be subtracted from its final weight.
Therefore, mass of aqueous solution = (26.451 – 23.176) g = 3.275 g
The mass of the aqueous solution was found to be 3.275 g.
Learn more about mass of a substance here brainly.com/question/20065039
#SPJ4
what is the hue associated with the color value hsl(90, 100%, 50%)? a. 90 b. 100% c. 50% d. cannot be determined by the color value
The color wheel has a scale of 0 to 360 for hue. Zero is red, 120 is green, and 240 is blue. The percentage value of saturation. 100% is the whole color, while 0% represents a particular grayscale.
The HSL color format is what?Hue, saturation, and lightness, or HSL, is a cylinder-coordinate representation of color. Hue is measured as a degree on the color wheel (which ranges from 0 to 360); 0 (or 360) is red, 120 is green, and 240 is blue.
What number of hues does HSL support?The three primary colors, R, G, and B, are the basic building blocks of all 16 million colors, albeit they are combined in various ratios. In a similar vein, the HSL color model allows you to produce the same 16 million hues.
To know more about hue visit :-
https://brainly.com/question/3758645
#SPJ4
a barometric pressure of 1021.0 millibars is equal to how many inches of mercury?
1021 millibars of barometric pressure is equivalent to 30.5 inches of mercury.
Define the element mercury.Mercury is a chemical element with an atomic number '80' and the symbol 'Hg'. Quicksilver is another name for it. The only metallic element that is referred to be liquid at room temperature and pressure is mercury. It is a substantial, metallic d-block element.
What are the three primary uses for mercury?Mercury can be used to create barometers, thermometers, as well as other scientific instruments. Because mercury conducts electricity, it can be used to make silent, position-sensitive switches. Mercury vapor is used in streetlight, florescent lighting, and billboards.
To know more about mercury visit :
https://brainly.com/question/10845236
#SPJ4
enzymes are catalysts that increase the rate of reactions by
By lowering the activation energy and consequently raising the rate of reaction, enzymes (and other catalysts) work.
What does it signify when an enzyme reduces a reaction's activation energy?By lowering the amount of energy required for reactants to combine and react, enzymes often lower activation energy. As an illustration, enzymes bring reactants to close so they don't have to waste energy dispersing themselves until they randomly collide.
Which of the following describes how activation energy is reduced by enzymes?The enzyme's ability to bind to two substrate molecules and precisely position them to promote a reaction is one way the activation energy is reduced.
to know more about catalysts here:
brainly.com/question/12733574
#SPJ4
Suppose you have 100.00 mL of a solution of a dye and transfer 2.00 mL of the solution to a 100.00-ml volumetric flask. After adding water to the 100.00 mL mark, you take 5.00 mL of that solution and again dilute to 100.00 mL. If you find the dye concentration in the final diluted sample is 0.000158 M, what was the dye concen. tration in the original solution?
The initial dye solution concentration was found to be 0.158M
How do I figure out a solution's concentration?Subtract the solute's mass from the total volume of the solution. Considering m as the solute's mass and V as the total volume of the solution, write out the equation C = m/V. To determine the concentration of your solution, divide the mass and volume measurements you acquired and plug them in.
The final flask contain dye concentration = 0.000158 M = C3
The original dye solution concentration = C1
First dilution:
2 mL of dye solution transfer to second 100mL flask
C1v1 = C2v2
=> C1 x 2 = C2 x 100mL
Second dilution:
5 mL of dye solution from second to third flask (100mL)
C2v2 = C3v3
=> C2 x 5 = 0.000158 x 100
C2 => 0.00316M
C1 => 0.00316 x 100/2
=> 0.158M
Dilution factor: what is it?The stock solution is diluted by a phenomenon called the dilution factor. As indicated in the equation above, it can be expressed as the fraction of the volume of the final diluted solution (V2) to the original volume taken from the stock solution (V1).
Learn more about concentration here:
brainly.com/question/10725862
#SPJ4