The alcohol functional group is polar and makes compounds more soluble in water.
Does water cause the dissolution of polar functional groups?According to the polarity of the systems, the simple rule "like dissolves like" applies: polar molecules tend to disperse in polar solvents (such as water and alcohols), while non-polar molecules tend to dissolve in non-polar solvents (e.g. hydrocarbon hexane).
What department is more polarized?Alkyl halides, ethers, amines, thiols, and alcohols. Because the bonding atoms' electronegativities differ more, these functional groups are noticeably more polar.
What substance is polar and increases the solubility of substances in water?Methanol is hence a polar solvent and polar solute that is miscible (soluble in water). For dissolving molecules with alcohol, amino, and acidic functional groups, it is the most polar organic solvent.
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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.
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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.
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will the amount of shielding increase, decrease, or stay the same as more valence electrons are added to the same energy level?
The amount of shielding will generally increase as more valence electrons are added to the same energy level.
Shielding Effect
In atomic physics, shielding refers to the process by which inner electrons shield or screen the positively charged nucleus from the outer electrons. The more electrons there are in an energy level, the greater the shielding effect. As more valence electrons are added to the same energy level, the effective nuclear charge experienced by the outer electrons decreases, resulting in increased shielding. This increased shielding means that the electrons will experience a weaker attractive force from the nucleus, making it less difficult for them to be removed from the atom or molecule, and therefore increasing the stability of the electron configuration.
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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.
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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.
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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.
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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:
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a rigid plastic container holds 40.29 g of propane gas (c3h8) at a pressure of 860.6 torr. what is the pressure (in torr) if 6.41 g of propane is removed at constant temperature? enter to 1 decimal place.
The pressure of a rigid plastic container after removing 6.41 g of propane at constant temperature is 554.4 torr.
The pressure of a gas in a container depends on its volume and number of moles of gas, as described by the ideal gas law:
PV = nRT
where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature (assumed constant).
So, if 6.41 g of propane is removed from the container, the number of moles of gas will decrease, and the pressure will decrease as well.
To calculate the new pressure, we need to calculate the number of moles of propane in the container both before and after the removal, and then use the ideal gas law to find the new pressure.
First, we calculate the number of moles of propane before the removal:
n = m/M
where m is the mass of propane (40.29g) and M is its molar mass (312.01 + 81.01 = 44.09 g/mol).
n = 40.29 g / 44.09 g/mol = 0.9107 mol
Next, we calculate the number of moles of propane after the removal:
n = 6.41 g / 44.09 g/mol = 0.1455 mol
Finally, we use the ideal gas law to find the new pressure:
P1V1 = n1RT
P2V2 = n2RT
V1/V2 = n1/n2
P2 = P1 (n1/n2)
P2 = 860.6 torr × (0.9107 mol / 0.1455 mol)
P2 = 554.4 torr
The pressure after 6.41 g of propane is removed will be 554.4 torr.
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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 ,
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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."
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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calculate the grams of indicated product when 18.0 g of the first reactant and 10.0 g of the second reactant are used. 4Li(s)+O2(g)→2Li2O(s) Calculate the mass of Li2O.
According to law of conservation of mass, the mass of product is sum of reactants which is 10+ 18= 28 grams.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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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).
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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.
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what type of bonds does carbon typically form to create biomolecules?
In order to make biomolecules like proteins and nucleic acids, carbon normally creates covalent bonds. Strong bonds known as covalent bonds are created when two atoms share electrons.
What uses does carbon serve?Metal smelting makes use of impure carbon that takes the form of coke made from coal and charcoal made from wood. It is crucial for the steel and iron industries in general. Graphite is utilized in furnace cladding, electric motor brushes, and pencils. Activated charcoal is employed in filtering and purification processes.
Where can you find carbon?The majority of the carbon on Earth is preserved in sedimentary deposits, with the remainder found in the oceans, sky, and living things.
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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.
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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⁺.
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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.
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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.
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If a sample of gas occupies a volume of 4.50 L at 50°C and 90.0 kPa, what temperature would the gas be at if the pressure increases to 120.0 ka and the volume decreases to 1.50 L?
If a sample of gas occupies a volume of 4.50 L at 50°C and 90.0 kPa. 60°C would be the final temperature if the pressure increases to 120.0 ka and the volume decreases to 1.50 L.
What is ideal gas?The ideal gas, sometimes known as the perfect gas, is a gas that, in physical behavior, corresponds to a certain idealized connection between pressure, volume, and temperature known as the ideal, or general, gas law.
This law is a simplification that includes both Boyle's and Charles' laws as special instances, and it asserts that for a given amount of gas, the product of volume V with pressure P is proportionate to absolute temperature T; that is, PV = kT, where k is a constant. This type of relationship for a material is known as its equation of state, and it is adequate to define its gross behavior.
P[tex]_1[/tex]×V[tex]_1[/tex]/T[tex]_1[/tex]=P[tex]_2[/tex]×V[tex]_2[/tex]/T[tex]_2[/tex]
substituting all the given values, we get
90.0×4.50/50=120.0×1.50/T[tex]_2[/tex]
T[tex]_2[/tex] = 60°C
Therefore, 60°C is the final temperature.
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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.
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if the atomic mass is less than double the atomic number, then which is true about the majority of the isotopes? group of answer choices the number of protons is greater than the number of neutrons. the number of electrons is less than the number of protons. the number of protons and the number neutrons are the same. the number of protons is less than the number of neutrons. the number of electrons is less than the number of neutrons.
Option C: It is true for the majority of isotopes that the number of protons is less than the number of neutrons if the atomic mass is less than twice the atomic number.
An element is distinguished from another by its atomic number, which is based on how many protons it has. The total number of protons and neutrons determines an element's mass number.
The contemporary periodic table is set up so that each element has an increasing number of atoms, which leads to an increase in mass number.
You see, electrons, protons, and neutrons make up one atom. The valency of the atom is determined by the number of electrons in the outermost shell. The atomic number and a mass number of the atom are also related to the number of protons and neutrons in an atom.
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