A solution has been prepared with 100 g of drug in 1,000 ml solution mg of drug are in 120 ml of the solution is 12000 mg
1,000 ml solution requires =100g of drug;
1 ml solution requires =100÷1000 g of drug;
= 0.1g of drug;
120 ml solution requires =0.1×120g of drug;
= 12g of drug;
= 12000 mg of drug;
The present clinical use of H2O2 continues to be constrained to the elimination of microbial infection and every now and then hemostasis, better information in the direction of the sterilization ability and cell behavior regulatory characteristic of H2O2 inside wounds will decorate the ability to exogenously augment and control recovery.
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Notice that in the last problem you calculated the grams of oxygen needed. what would the volume of this oxygen be at stp? report your answer in liters to the nearest whole number.
The volume of oxygen required at STP is 7 L.
STP is a pressure of a hundred kPa and a temperature of 273.15 k. Or, 1 mole of any perfect gasoline occupies 22.7 L at STP.
therefore, we need to discover the range of moles of oxygen required within the reaction.
using the molar mass of water,
10.five g × 1 mole of water/ 18.02 g = 0.577 moles of water.
1: 2 is the ratio between oxygen and water in a water molecule, because of this 1 mole of oxygen produces 2 moles of water.
0.577 moles of H₂O × 1 mole O₂ / 2 moles of H₂O = zero.2885 moles O₂.
So, if 22.7 L at STP is occupied via 1 mole, then
zero.2885 × 22.7 L / 1 mole = 6.548 L
Rounded to the nearest entire wide variety, we get 7 L.
consequently, the quantity of oxygen at STP is 7L.
standard temperature and strain (STP) is described as 0oC (273.15K) and 1atm strain. The molar extent of a gasoline is the extent of 1 mole of a fuel at STP . At STP, one mole (6.02×1023 representative debris) of any gasoline occupies a volume of twenty-two.4L
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In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of:?
In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of a butyl radical cation.
What does the mass spectrum of pentane look like at the molecular level?Because all molecular ions fragment, a few compounds have mass spectra that lack a molecular ion peak. That is not a problem you will encounter at A'level. In the mass spectrum of pentane, for example, the heaviest ion has an m/z value of 72.
In pentane, what is the m/z of the fragment ion?Lines with m/z values one or two lower than one of the simple lines, for example, are frequently caused by the loss of one or more hydrogen atoms during the fragmentation process. The base peak (the tallest peak and thus the most common fragment ion) is at m/z = 57 this time. This, however, is not produced by the same ion as the pentane m/z value peak.
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chelsea went ice-skating. the ice, her skates, the zamboni, and the rink building itself were all examples of solids she encountered. she developed a model of the particles in the ice. which of these statements about the particles present in her model of a solid are true? choose the three statements that apply.
The three statements about a model of the particles in the ice:
They vibrate in place.
They are packed very closely together.
They cause the solid to have definite volume and definite shape.
For example, chemical compound water (H₂O) is liquid. Molecules of water are not rigid as in solid state (ice) and can move. In solid state (in this example ice) movement of molecules is more slow than movement of molecules in liquids (for example water).
Solids have fixed shapes and volumes because particles occupy a fixed position in the crystal lattice.
Strong cohesive forces keep particles (molecules, atoms, or ions) in place, with little void spaces, resulting in very low compressibility and thermal expansion.
Solids have high density that varies very little with temperature.
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When you do a load of laundry, why do you not just drop a bar of soap into the washing machine? in other words, why is laundry detergent sold as a liquid or powder?
We use laundry detergent as a liquid or powder because powder and liquid detergents have more enzymes.
What is detergent?
When present in diluted solutions, a surfactant or combination of surfactants has the ability to clean.There are many different types of detergents; one popular family is the alkylbenzene sulfonates, which are soap-like substances that are more soluble in hard water because the polar sulfonate in detergents is less likely to bind to calcium and other ions found in hard water than the polar carboxylate in soap.
Detergents in both powder and liquid form contain additional enzymes and surfactants that break down grease and slime on clothing. Additionally, because the molecules of liquid and powder soaps can move more freely than those of solid bar soap, it is simpler for them to function as nonionic surfactants.
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For the following electronic configuration of neutral atoms, [ne]3s23p5 , what is the element and the number of unpaired electrons in its ground state?
The number of unpaired electrons is 7.
What is unpaired electrons?When an electron resides in the orbital of an atom in chemistry, it is said to be unpaired if it is not a part of an electron pair. Each of an atom's atomic orbitals is large enough to accommodate two electrons with opposite spins.
This electron configuration is known as the noble gas configuration because the core electrons in it are represented by the noble gases that have the appropriate number of electrons.
According to the electron configuration, the atom has 7 more electrons than neon. As a result, the atom is chlorine.
Unpaired electrons are the ones that appear in an orbital alone, whereas paired electrons are the ones that appear in an orbital as pairs in an atom.
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The number of unpaired electrons is 7. The element is Chlorine.
What is unpaired electrons?An unpaired electron is an electron that doesn't form part of an electron pair when it occupies an atom's orbital in chemistry.
Two electrons with opposing spins can fit into each of an atom's atomic orbitals.Because the noble gases that match to the right amount of electrons represent the core electrons in this electron configuration, it is known as the noble gas configuration.
The atom possesses 7 more electrons than neon, according to the electron configuration. The atom is chlorine as a result.
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What cellular component is responsible for energy production and metabolic processes?
The cellular component responsible for energy production and metabolic processes is mitochondria.
What is Mitochondria?
A double-membrane-bound organelle known as a mitochondrion is found in the majority of eukaryotic organisms. The majority of the cell's adenosine triphosphate, which is then used as a source of chemical energy throughout the cell, is produced by mitochondria using aerobic respiration.
Oxidative phosphorylation, which produces ATP using the energy released during the oxidation of the food we eat, is the traditional function of mitochondria. For the majority of biochemical and physiological processes, including growth, mobility, and equilibrium, ATP is used as the main energy source in turn.
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Which option correctly identify a type of mixture?
a. Homogeneous mixtures have parts that are distributed unevenly.
b. Homogeneous mixtures have parts that are distributed evenly.
c. Heterogeneous mixtures have parts that are distributed unevenly.
d. Heterogeneous mixtures have parts that are distributed evenly.
The statement that correctly identifies the type of mixture is that homogeneous mixtures have parts that are distributed evenly. The correct option is c.
What is homogenous mixture?A homogeneous mixture is sole in which the composition is consistent throughout the solution.
Since the dissolved salt is evenly distributed throughout the salt water sample, the salt water described as an illustration is homogeneous.
The statement that accurately defines the type of mixture is that homogeneous mixtures have evenly distributed parts.
Thus, the correct option is c.
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pls help me?
list 5 items that have evolve overtime
2. Which of the following is determined by distance divided by time with direction?
a Acceleration
b Velocity
C speed
Electrodes have been placed on samantha's scalp. her doctor wants to assess her brain-wave activity through the use of a(n)?
Electrodes have been placed on samantha's scalp. her doctor wants to assess her brain-wave activity through the use of an electroencephalogram, or EEG. An electroencephalogram (EEG) is a test that uses small metal discs (electrodes) connected to the scalp to assess electrical activity in the brain.
Brain cells interact by electrical impulses and are constantly active, even while sleeping. An EEG is a test that detects irregularities in your brain's electrical activity or brain waves. Electrodes comprised of small metal discs with thin wires are deposited onto your scalp during the process. An EEG is primarily used to detect and investigate epilepsy.
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A first-order reaction that results in the destruction of a pollutant has a rate constant of 0.1/day. how many days will it take for 68 percent of the chemical to be destroyed?
In a first-order reaction, it takes 23.02 days for 68 percent of the chemical to be destroyed.
Given,
fee constant for the destruction of pollutant = 0.1/day
We ought to discover the number of days it'll take for sixty eight percent of the chemical to be destroyed.
[A] = [A]₀e^⁻kt
in which [A] is the present awareness, and
[A]₀ is the initial awareness
k is the price of decrement
[A]₀ = 1
[A] = 0.1
Or, t =㏑(10)/k
Or, t = 2.302/zero.1
Or, t = 23.02 days.
for this reason the wide variety of days required for the destruction of sixty eight percent of chemicals is 23 days.
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Two+solutions+are+made+by+mixing+sugar+and+enough+water+to+make+a+1+liter+solution.+one+contains+10%+sugar+and+the+other+20%+sugar.+which+solution+has+more+solvent?
The answer is 10% sugar have more solvent.
A solution that comprises as much solute as can mixed in a given solvent at a given temperature is known as saturated solution. If you add more than 200 grams of sugar to a liter of 2 °C water, the extra sugar won’t dissolve. On the other hand, a solution containing less than 200g of sugar in 1 liter of 20 °C water can hold more sugar. A solution that comprises less solute than can mixed at a given temperature is known as unsaturated solution.
Saturated solution is also called as supersaturated solution.
According to question,
The answer would be 10% grams of sugar have more solvent.
It is very known that small size or amount of solute mixed faster as comparison to higher amount of sugar.
So if you add another solute to the mixture of 20 g of sugar solution it takes more time and also there will be no space left in the molecules of the 20 g of the sugar solution and hence less solvent as compared to 10% gram of solvent.
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How many ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6?
19 ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6
Here pH=Pka-log[A]/[B]
= 9.6=9.24-log[A]/[B]
= log[A]/[B]=-0.36
Here for ml molarity formula is used
Molarity=mass/volume here mass of sodium borate is 381g/mol and volume of solution is 200ml
mass/volume=381/200=1.905/5.0×50=19ml
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Scientists use the theory of plate tectonics to understand the reasons volcanoes develop in
certain locations. how does this show the validity of the theory?
a.the scientists are using observations.
b.the scientists are making predictions.
c.the scientists can see the plates moving beneath the volcano.
d.the scientists are repeating the experiments .
Scientists use tectonics plates to understand the plates moving beneath the volcano.
What are tectonic plates?
According to the widely recognized scientific hypothesis known as plate tectonics, the Earth's lithosphere is made up of many sizable tectonic plates that have been steadily moving for nearly 3.4 billion years. Our globe would look drastically different if it weren't for plate tectonics. We have a stable climate, mineral and oil deposits, and oceans with a chemical balance that supports life thanks to the continuous recycling of the Earth's crust. Even now, every few hundred million years, it offers evolution a boost. The plates fit tightly against one another and sit on the heated, molten rock of the Earth's mantle like fragments of a broken shell. The plates move as a result of the heat produced by nuclear processes occurring inside the planet.
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1. 34g of CaCO3 was heated and decomposed completely. The reaction equation is shown below.
CaCO3(s) --> CaO(s) + CO2(g)
1.1 calculate the number of moles of CaCO3 that decomposed
1.2. Calculate the number of particles of CaO that can be produced
The number of particles produced is 8.1 * 10^21 particles.
What is number of particles?The equation of the reaction is; [tex]CaCO3(s)-- > CaO(s) + CO2(g)[/tex]. We can be able to obtain the number of moles of the calcium carbonate can be obtained from;
Mass = 1.34 g
Molar mass = 100g
Number of moles = 1.34 g/ 100g = 0.0134 moles
Thus, the number of moles of carbonate that decomposed is 0.0134 moles
Given that the reaction is 1:1 and there are 6.02 * 10^23 particles in 1 mole of CaO, the number of particles of CaO produced is;
0.0134 moles * 6.02 * 10^23 particles = 8.1 * 10^21 particles
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formula for chlorine reacting with lithium and carbon
HELP!! ASAP!! PLEASE!!
The pictured compound has which bond?
C = C and C −H
uppercase C double bond uppercase C and uppercase C single bond uppercase H,
C −Cand C −H
uppercase C single bond uppercase C and uppercase C single bond uppercase H,
C = C and C −C
uppercase C double bond uppercase C and uppercase C single bond uppercase C,
C −C, C −H, and C −O
The bonds that are present in the pictured compound are C −C and C −H.
What is a bond?A bond is that which connects two atoms together. We know that a compound is composed of bonds. There are a number of bonds in a compound. The bonds are always as many as the atoms that need to be linked in the compound.
We know that butane a shown in the image is an alkane. An alkane has carbon - carbon and hydrogen - carbon bonds. There are no multiple bonds in the compound butane.
Thus, the bonds that are present in the pictured compound are C −C and C −H.
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A package of chocolate instant pudding contains 2640 mg of sodium. how many grams of sodium are in the pudding?
Answer:
2.640
Explanation:
Rounding to the nearest whole number would be 3 if that is needed.
When atp is hydrolyzed to power a condensation reaction, what happens to the phosphate molecule that is released?
The phosphate molecule that is released it is coupled to a different ADP molecule to make new molecule of ATP.
Hydrolysis of high-energy compound (ATP) using water:
ATP + H₂O → ADP + Pi
ATP is short for adenosine triphosphate.
Hydrolysis is a reaction that breaks down the chemical bonds between molecules via the addition of a water molecule.
A condensation reaction is a reaction that joins two molecules in a chemical bond.
ATP is resynthesized in a condensation reaction that adds an inorganic phosphate group to ADP. The addition of a phosphate group is catalyzed by the enzyme ATP synthase.
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To make a water-insoluble substance water-soluble, a chemist could add groups with bonds between.
Answer:
atoms with a different attraction for electrons
Explanation:
A chemist can add groups with bonds between atoms that have distinct electron attractions to make a chemical that is not soluble in water into solution.
Thus, A medicine or substance that is water soluble is more easily absorbed by your digestive system.
Positive and negative energy are drawn together, creating a stable structure. Polar ions or compounds break down or disintegrate into smaller components when they are added to water. They may also dissolve and mix with the solution.
The various components of a compound are drawn to water's partial charges. It becomes more soluble in the water when attraction takes place.
Thus, a substance can become water soluble by introducing groups with bonds between atoms that have distinct electron attractions.
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A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then filed, creating small pieces of iron shavings. These pieces burn brightly when placed over an open flame. Which statement accurately identifies one of the changes that occurs as a physical or chemical change?
A. Burning the iron filings is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
B. Burning the iron filings is a physical change because the composition of the material does not change but the general appearance of the iron does change.
C. Filing the nail is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
D. Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.
PLEASE HELP ITS URGENT 20 POINTS!!!!!!!!!!!!!!!!!!!!!!!
While burning iron shavings results in a chemical change, the formation of little particles of iron shavings is a physical change.
Small bits of iron shavings being formed are an example of a physical change because they can be transformed back into nails, whereas small pieces of iron shavings being burned on a flame are an example of a chemical change since they cannot be transformed back into their original shape. Chemical change is a change in matter that modifies the chemical properties of the substance as opposed to physical change, which modifies the matter's physical characteristics.
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Calculate the percentage by mass of oxygen in ammonium nitrate (NH4NO3).
Relative atomic masses (Ar): H= 1 N = 14 O=16
Relative formula mass (Mr): NH4NO3 = 80
Answer: The percentage of nitrogen and oxygen in ammonium nitrate is 35% and 60%
Explanation:
perform the following operation and express the answer in scientific notation 5.7365 x 10^-5 / 3.4891 x 10^-8
The e answer in scientific notation 5.7365 x[tex]10^{-5}[/tex]/ 3.4891 x [tex]10^{-8}[/tex] is 1.64 x [tex]10^{3}[/tex] .
Calculation ,
5.7365 x [tex]10^{-5}[/tex] / 3.4891 x [tex]10^{-8}[/tex] = 1.64 x [tex]10^{3}[/tex] = 1644
Below are the five guidelines for scientific notation:
1. The base must always be 10.
2. The exponent must be an integer that is non-zero, meaning it may be positive or negative.
3. The coefficient's absolute value is more than or equal to 1, but it must be less than 10.
4. Both whole and decimal numbers, including positive and negative numbers, can be used as coefficients.
5. The remaining significant digits of the number are carried by the mantissa.
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Proton a couples to proton b. proton a posseses a j-value of 3.0 hz. what do you expect the j-value proton b posseses to be? (1 pt)
Proton a couples to proton b. proton a possesses a j-value of 3.0 Hz. the j-value proton b possesses to be 3.0hz.
A proton contains two up quarks and one down quark. A neutron contains one up quark and two down quarks. The core is held together by one of four fundamental forces, the "strong nuclear force" (gravitational and electromagnetic forces are the other two). Heavy atoms tend to have more neutrons than protons, but the number of electrons in the atom is always equal to the number of protons. Therefore, the atom as a whole is electrically neutral.
There are two types of protons and neutrons: up quarks and down quarks. Each up quark has a +2/3 charge. Each down quark has a charge of -1/3. The sum of the charges of the quarks that make up the nuclear particle determines its charge.
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Write a balanced chemical equation for the standard formation reaction of solid calcium hydroxide caoh2
The balanced chemical equation for the standard formation reaction of solid calcium hydroxide CaOH2 is:
Ca + O2 + H2 → Ca(OH)2
The reactant components that are required in the standard states are calcium(Ca), Oxygen(O2), and hydrogen(H2). Oxygen and hydrogen are in their gaseous form and calcium is in solid state.
All of these reactants react to form Ca(OH)2 which is also known as slaked lime.
Ca + O2 + H2 → Ca(OH)2
This chemical equation is balanced because there are 1 Ca, 2 Oxygen atoms and 2 Hydrogen atoms on either sides.
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The molecular weight of ethanol ( c2h5oh ), the alcohol in alcoholic beverages, is ________ amu (rounded to one decimal place). 46.1 45.1 9.0 29.0 26.0
The molecular weight of ethanol, in the alcohol in alcoholic beverage, is 46.1 amu.
What is ethanol?
Ethanol is a substance derived from organic compounds. With the chemical formula C2H6O, it is an alcohol. EtOH, its chemical name, is also occasionally abbreviated as CH3CH2OH or C2H5OH. Alcohol is a highly flammable, colorless liquid with a strong wine-like odor and astringent flavor.
Pharmaceuticals, polymers, lacquers, polishes, plasticizers, and cosmetics are all made with ethanol. Ethanol is used in medicine as an antidote for methanol or ethylene glycol intoxication as well as a topical anti-infective.
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Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. the liquid is a(n)?
Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. The liquid is a mixture
What is a mixture?
Typically, a mixture is described as a fabric that is composed of or greater separate chemical additives that are not chemically sure to each other.
The bodily mixture of some of substances wherein the characteristics of every factor are maintained as the components are combined into answers, suspensions, or colloids is known as a aggregate.
for this reason, it is feasible to bodily separate a number of the liquid in a jar into awesome liquids, and then the drinks can now not be separated anymore.
therefore, the liquid in a jar is a combination.
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What is the definition of Buffer solution !!
Answer:
a solution which resists changes in pH when acid or alkali is added to it is known as Buffer solution
3. draw the lewis structure for these anions. each anion is a conjugate base of an acid. (e) hco3─ (h attached to one of the o’s) (f) so32─
The lewis structure for these anions are-
a fairly straightforward manner to visualize a molecule's valence shell electrons is through a Lewis structure. It gives insight into the pairing and association of the electrons surrounding every atom in the molecule.
every electron inside the Lewis dot structure can be represented via a dot, and a line connecting the dots is drawn to shape an electron bond.
simplest the valence electrons are taken under consideration whilst sketching the Lewis dot shape, ignoring the electrons that don't belong to the outermost shell.
The Lewis shape is the most effective and maximum constrained speculation; it does no longer describe how bonds are created or how electrons are disbursed most of the atoms. And that is visible as the essential constraint at the Lewis shape.
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An a-t base pair consists of _____ h-bond(s); a c-g base pair consists of _____ h-bond(s).
An a-t base pair consists of 2 h-bond(s); a c-g base pair consists of 3 h-bond(s). The correct option is E.
What are base pairs?
Base pairs are the pairs that are made up of nucleotides. They are pairs of DNA bases. The base pairs are connected with each other by hydrogen bonds.
In between adenine and thymine, there are two or double hydrogen bonds present and between cytosine and guanine, there are triple bonds present.
So, there is 2 hydrogen bonds and triple hydrogen bonds in the base pairs of DNA, the genetic material.
Thus, the correct option is E, 2, 3.
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The question is incomplete. Your most probably complete question is given below:
A. 1, 2.
B. 2, 1.
C. 2, 2.
D. 3, 2.
E. 2, 3.