The original buffer solution is 0.00312.
Solution:
let initially a moles of sodium acetate present
moles of HCl added = Molarity x volume = 0.07969x 19.6×10⁻³= 1.56×10⁻³
to attain an equivalence point.
moles of sodium acetate = miles of acetic and (x-1-56×10⁻³) = 1.56×10⁻³
x = 2x1.56×10⁻³
= 0.00312
so, the number of moles of sodium acetate in the original buffer solution is 0.00312.
Sodium acetate is a widely used reagent in molecular biology applications. Used as a buffering agent with acetic acid. Basic buffers have weak bases and salts of bases. Natural buffers are found in organisms whose biochemical reactions are highly sensitive to changes in pH.
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how many milliliters of 10.8 m perchloric acid solution should be used to prepare 4.50 l of 0.400 m ?
166.6 mL of the stock solution that is perchloric acid is needed to prepare 4.50 l of 0.400m.
What is perchloric acid ?With the chemical formula HClO4, perchloric acid is a mineral acid. This colourless chemical, which is often found as an aqueous solution, is a stronger acid than sulfuric acid, nitric acid, and hydrochloric acid.Ammonium perchlorate, a crucial component of rocket fuel, can be prepared with the help of perchloric acid, which is also useful for other perchlorate salts. Perchloric acid is very corrosive and easily creates mixes that could explode.There are two methods for producing perchloric acid industrially. The conventional method takes advantage of sodium perchlorate's high aqueous solubility.Molarity of stock solution (M1) = 10.8 M
Molarity of diluted solution (M2) = 0.4 M
Volume of diluted solution (V2) = 4.5 L
Volume of stock solution needed (V1) =.?
The volume of the stock solution needed can be obtained by using the following formula:
M1V1 = M2V2
10.8 × V2 = 0.4 × 4.5
10.8 × V2 = 1.8
Divide both side by 10.8
V2 = 1.8 / 10.8
V2 = 0.1666 L
Finally, we shall convert 0.1666 L to millilitres (mL) in order to obtain the desired result. This can be obtained as follow:
1 L = 1000 mL
Therefore,
0.1666 L = 0.1666 L × 1000 mL / 1 L
0.1666 L = 166.6 mL
Therefore, 0.1666 L is equivalent to 166.6 mL.
Thus, 166.6 mL of the stock solution (i.e perchloric acid) is needed.
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an incident electron removes a k-shell electron and a n-shell fills the vacancy. what is the energy of the k-characteristic photon produced?
The filament electron must have 69.5 keV of energy or more to remove a k shell electron.
When orbital electrons of target atoms are removed from their shell and outer shell electrons fill inner shell vacancies. To fill this vacancy, the outer shell electron releases some of its potential energy as a characteristic photon.
when filament electrons miss all the orbital electrons of the target atoms and interact with the nuclei . The attraction of the filament electron of the nucleus causes it to slow down and change direction. the resultant loss of energy is given off as a brems photon.
The shells involved and named for the shell being filled.
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What is the importance of Commission of election in the Philippines?.
In the democratically run Philippines, everyone has the right to vote. This organization is intended to be constitutionally independent of the executive, legislative, and judicial branches of government in order to ensure the holding of free, fair, and honest elections.
Each voter is allowed one vote during the election period. A voter may split their ballot. There is no second round of voting, and the president and vice president may be from different political parties. The candidate with the most votes wins the job. The President serves as the nation's head of state and government as commander-in-chief of the Philippine Armed Forces. As the chief executive, the President is in charge of all executive offices, bureaus, and departments. one of the three branches of government
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if the enthalpy of neutralization of sodium hydroxide with hydrochloric acid is -57 kj/mol, what is your percent error? quora
The percentage error is 102 whenever the efficiency for neutralizing sodium hydroxide with hydrochloric acid drops to -57 kj/mol.
What is hydrochloric acid good for?Turmeric encourages healthy skin, improves skin health, aids for digestion, fights acid reflux and acidity, has antibacterial properties, prevents leaky gut, battles candida, and helps the body absorb nutrients. HCL is additionally created synthetically for use in a range of commercial and academic settings. It encourages healthy skin, promotes skin health, helps in digestion, fights acid reflux and acidity, has antibacterial properties, prevents leaky gut, battles candida, and helps the body absorb nutrients.
Briefing:According to the equation hydrochloric acid is -57 kj/mol,
H⁺+NH₄OH→NH₄⁺+H²O ΔH=-51kJ mol
NH₄OH→NH₄⁺+OH⁻ ΔH₁=?
H⁺+OH⁻ → H₂O ΔH₂=51kJ mol
ΔH=ΔH₁+Δ₂H
ΔH₁=-51-51
ΔH₁= 102
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Which raw food should be stored above all?.
The sequence of raw meat, poultry, and fish in the refrigerator should be entire fish, whole cuts if beef and pig, ground protein foods, as well as the whole mixed ground chicken.
Just what is food, please?food is a material that is mostly made up of nutrients such as protein, carbohydrates, and fat and is utilized by organisms to fuel their development and important operations.
Why is food such a big deal?One of life's fundamental needs is food. Nutrients are compounds that are necessary for the control of important activities as well as the development, repair, as well as maintenance of bodily tissues.
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organize the steps of the mechanism for acid-catalyzed nucleophilic addition to an aldehyde or ketone in the correct sequence, starting with the first step at the top of the list.
Carbonyl oxygen is protonated, the carbonyl carbon is added with a nucleophile, and the old nucleophile is deprotonated.
What alters your body do ketones have?If mistreated, ketones can harm your body by upsetting the chemical equilibrium of your blood. Your body will attempt to eliminate excess ketones through urine because it cannot handle them. They eventually accumulate in the blood.
Urine is it a ketone?When your cells run out of glucose, your body turns to fat for energy. Ketones, an acid produced as a result, can accumulate in you blood and urine. It's normal to have some ketones throughout your pee. However, excessive quantities of ketone in your urine might indicate because your body is overly acidic.
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for each mole of glucose (c6h12o6) oxidized by cellular respiration, how many moles of co2 are released in the citric acid cycle
For every mole of glucose (C6H12O6) that is metabolized by cellular respiration, this citric acid cycle releases 4 moles of CO2.
What is respiration in human biology?Through respiration, which involves consuming oxygen and exhaling carbon dioxide, living beings generate energy. Respiration is a substantial and crucial gas exchange mechanism, it follows. The carbon and oxygen used in breathing are transported via the blood.
What is respiration and types?The phrase "respiratory system" actually is the process by which food is metabolized to produce energy. Both aerobic and anaerobic respiration are the two types. Aerobic respiration is defined as respiratory that takes place while there is air containing oxygen.
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In each of the following cases, indicate the item with the more inelastic (i.e., less elastic) demand: (each of these answers is worth 2 points) Enter the number 1 or 2, as instructed. Any other entry will be marked as incorrect by the grading algorithm, so be careful. You may wish to refer to the lecture notes entitled Determinants of Price Elasticity of Demand in the COURSE CONTENTS section.
a. The for gasoline (enter 1) vs. the demand for champagne (enter 2).
b. The demand for rides on the subway for one week (enter 1) vs. the demand for rides on the subway over a period of one year (enter 2).
c. The McConnell, et al textbooks (10th edition) at the college bookstore (enter 1) vs. the demand for pulp fiction books at the newsstand, grocery store, drug store, etc. (enter 2).
d. The demand for Morton's salt (enter 1) vs. the demand for salt (enter 2) .
e. The demand for a house (enter 1) vs. the demand for a piece of chewing gum (enter 2).
The demand for subway rides over the course of a year versus the demand for rides over a week (enter 1).
What is gasoline made of?Gasoline is a mixture of several different molecules hydrogen and carbon (hydrocarbons). A typical gasoline mixture typically contains 150 different hydrocarbons, including butane, n - heptane, isopentane, and the BTEX chemicals (benzene, ethylbenzene, toluene, and xylenes).
Which is it: gasoline or petrol?Combination of burnable, volatile liquid hydrocarbons derived from petroleum that is used as motor vehicle fuel; also known as gasolene, gas, or petrol. It also functions as a solvent for fats and oils.
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enter your answer in the provided box. how many milliliters of 1.16 m naoh must be added to 175 ml of 0.20 m nah2po4 to make a buffer solution with a ph of 7.30? ml
The volume of the Naoh that is required was =4.074
What is the use of the buffer solution ?
A buffer is an aqueous solution made up of a weak acid and its salt (acid buffer) or a weak base and its salt (base buffer) (basic buffer). When a small amount of strong acid or base is added to it, its pH changes very little, and it is thus used to prevent the pH of a solution from changing.
Buffer solutions are utilised in several chemical applications. Blood is one example of a natural buffer solution. The natural pH of human blood is 7.4. Many people suffer from severe anxiety and alkalosis. Alkalosis is a condition in which the blood pH is abnormally high. The opposite situation is known as acidosis, which occurs when the pH of the blood exceeds 7.4.
naoh+nah2po4 ------------> h2o+na3po4
pka=3.39
7.30=3.39+(log(h2o/naoh)
log(h2o/naoh)=7.30-3.39
=3.91
=10^log(h2o/naoh)=10^3.91
=4.074
The volume required was=4.074
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potassium permanganate, kmno4 , is a powerful oxidizing agent. the products of a given redox reaction with the permanganate ion depend on the reaction conditions used. in basic solution, the following equation represents the reaction of this ion with a solution containing sodium sulfite:
Mn is in the +7 state in KMnO4, which is a potent oxidizing agent. While it will operate as an oxidizing agent in neutral and basic media, there is a change of 5 electrons in acidic media.
The excellent oxidizing agent permanganate Why?The electronegative properties of the elements increase with the oxidation states of the atoms. Permanganate is a good oxidizing agent because of this.
KMnO4 will be utilized as a titrant; what will happen?While gently swirling the solution in the flask, the heated solution is titrated against a solution of potassium permanganate. Oxalic acid initially causes KMnO4 to lose its purple color. The conclusion is revealed by the appearance of permanent pink color.
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which of the following is an easy and sustainable way for campuses to reduce waste? which of the following is an easy and sustainable way for campuses to reduce waste? canals for dumping waste incinerators for garbage outsource to companies that specialize in recycling recycling bins
The easy and sustainable way for campuses to reduce waste is recycle bin.
A recycling bin is a container used to store recyclables before they are transported to recycling facilities. There are recycling bins of various sizes that may be used inside and outside of residences, workplaces, and huge public buildings.The recycling bin's function is to gather items that would have gone to landfills. To create new objects, these items are frequently processed again. You may put a variety of items in a recycling container. Papers, metal scraps, periodicals made of plastic, old gadgets, and a lot more can be added.Businesses may use different colors for different kinds of trash and recycling containers, however these are the most often seen colors: PAPER AND CARDBOARD: BLUE. Glass bottles and jars are green. RED: Containers and packing made of plastic.Thus the correct answer is recycling bins.
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8. Some people practice brining their turkey. This means they let it soak in a solution overnight. The solution diffuses into the turkey. This means that the turkey is placed into a ___________________ solution.
Some people practice brining their turkey. This means they let it soak in a solution overnight. The solution diffuses into the turkey. This means that the turkey is placed into a hypertonic solution.
What is a hypertonic solution?A hypotonic solution is described as a solution that has lower osmotic pressure than another solution to which it is compared.
The concept of tonicity helps us understand that the saltwater we use to brine the turkey is typically considered hypertonic solution because it has a greater concentration of solutes than the liquid found inside the cells.
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The lock-and-key model and the induced-fit model are two models of enzyme action explaining both the specificity and the catalytic activity of enzymes. Following are several statements concerning enzyme and substrate interaction. Indicate whether each statement is part of the lock-and-key model, the induced-fit model, or is common to both models. Note: If you answer any part of this question incorrectly, a single red X will appear indicating that one or more of the phrases are sorted incorrectly.
The statement, which solely follows the lock and key model is that the active site of the enzyme possesses a rigid composition complementary to that of a substrate.
The substrate serves as the key and the enzyme serves as the lock in the lock and key model. This model demonstrates that the substrate has a specific form that only allows it to fit in the enzyme and prevents the binding of any other substrate. According to the induced fit model, when an enzyme's active site interacts with the proper substrate, the enzyme modifies its configuration to conform to the structure of the molecule.
The statement which follows the induced fit model is that the conformation of the enzyme changes when it combines with the substrate so that the active site fits with the substrate.
Both models imply the statements that the substrate and enzyme interact noncovalently and that the binding of the substrate to the active site of the enzyme results in an enzyme-substrate complex.
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how many liters of hydrogen gas are formed from the complete reaction of 17.2 g of c(s) ? assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 360 k .
There is 42.2756 liters of hydrogen gas are formed from the complete reaction of 17.2 g of c(s)
we can calculate the volume as follows:
first we should write the balanced equation
C(s) + H₂ O(g) ⟶ CO(g) + H₂ (g)
then we can calculate the moles corresponding to 17.2 g of C
The molar mass of C is 12.01 g/mol.
n = g / mass molar
n= 17,2 = 1.4321 moles
12.01
then we can calculate the moles of H₂ produced from 1.4321 moles of C
The molar ratio of H₂ to C is 1:1. The moles of H₂ produced are 1/1 × 1.4321 moles = 1.4321 moles.
finally calculate the volume of H₂
We will use the ideal gas equation.
PV =nRT
V = nRT
p
V = 1.4321 moles x 0.082 atm.L/mol.°K X 360°K
1 atm
V = 42.2756 L
your question is in complete but most probably the full question is
Consider the chemical reaction: C(s) + H₂ O(g) ⟶ CO(g) + H₂ (g). How many liters of hydrogen gas is formed from the complete reaction of 17.2 g C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 360 K.
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the citric acid cycle is activated in the presence of oxygen (o2), but what is the link between the citric acid cycle and o2?
Citric acid cycle uses free oxygen as the final electron acceptor.O2 is an allosteric activator for citrate synthesis.
The citric acid cycle is a series of chemical reactions that removes high-energy electrons and uses them in the electron transport chain to generate ATP. The presence of O2 in mitochondria releases CO2 into cytosol. One molecule of ATP is produced per each turn of the cycle. The electron transport chain is the portion of aerobic respiration that uses free oxygen as the final electron acceptor for electrons removed from the intermediate compounds in glucose catabolism. The electrons are passed through a series of chemical reactions with a small amount of free energy used at three points to transport hydrogen ions across the membrane. This contributes to the gradient used in chemiosmosis. As the electrons are passed from NADH or FADH2 down the electron transport chain, they lose energy. The products of the electron transport chain are water and ATP. A number of intermediate compounds can be diverted into the anabolism of other biochemical molecules. such as nucleic acids, non-essential amino acids, sugars, and lipids. These same molecules except nucleic acids can serve as energy sources for the glucose pathway.
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Which statement concerning the interaction between two atoms is incorrect?
a. If two atoms are widely separated, there is very little attraction between them.
b. When two atoms are one bond length apart, the electrons on one atom are attracted to the
nucleus of the other atom.
c. When two atoms have very little separation between them, repulsion occurs.
d. A covalent bond occurs when electrons are shared between two nuclei.
e. As atoms get closer together, their electrons attract each other.
Statement which is incorrect concerning interaction between two atoms is that as atoms get closer together, their electrons attract each other.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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a student is asked to make 100 ml of 0.196 m kcl solution. how many ml of 0.585 m kcl is needed to make the 0.196 m kcl solution?
3.36ml volume of of 0.585 m KCL solution is needed to make 0.196m kcl solution.
Molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution in terms of amount of substance per unit volume of solution. The unit for molarity is the number of moles per liter. It has the unit symbol mole/l.
here, 100ml of 0.196m Kcl solution made. Moles of the solution is given by the expression,
Moles = Molarity . volume (in liter)
Moles in 100ml 0.196 m Kcl solution= Molarity . volume in liter
= 0.196 . 0.1
= 0.0196 mole
We know that 1ml is equal to 0.001L. By converting this value and put it in the expression we get the value of mole.
Volume= moles/molarity
Volume of the 0.585m KCl solution = moles /molarity
= 0.0196/0.585 L
=0.033504 L= 3.3504 ml
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Rank the relative nucleophilicity of the indicated species in water. Most nucleophilic Least nucleophilic CH3S- CH3COO- CH3COOH CH3OH CH30
The most nucleophilic molecule will be CH3S^- and most nucleophilic molecule will be CH3COOH.
When referring to compounds that frequently transfer electron pairs towards electrophiles in a bid to form chemical bonds with them, the term "nucleophile" is employed. Every ion or molecule with a free electron pair or even a pi bond with two electrons seems to have the capacity to act in a nucleophilic manner.
a nucleophile is an atom as well as the molecule which searches for a positively center during a chemical reaction, including the nucleus and an atom, since the nucleophile seems to have a pair of electrons that are ready for bonding.
The increasing order of nucleophilicity is CH3S- > CH3O- >CH3COO->CH3OH >CH3COOH.
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What are the benefits of warm-up exercises?.
Arsenic stops the krebs cycle working. Predict what will happen to the concentration of pyruvate, nadh and h+ when the krebs cycle is stopped by arsenic.
vapour pressure easily measured chemical volality
volality is work by a substances vapour pressure.
Evaporation is a unit operation .
Substance with higher vapour pressure will vaporizer more readily at a given temperature than substances with lower vapour pressure.
Substance with higher vapour pressure will vaporizer more readily at a given temperature than substances with lower vapour pressure.
It is more used by chemist and scientists to know about the chemical concentration in the air .
It is more used by chemist and scientists to know about the chemical concentration in the air .
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experiment 3: use your calibration plot to determine the copper(ii) sulfate concentrations in your two unknown samples.
By testing an unknown CuSO₄ solution's absorbance with a Colorimeter The concentration on the horizontal axis of the graph can be calculated by finding the absorbance of unknown on the vertically axis of the graph.
What do you mean by concentrations?Concentration is the amount of a substance in a particular space. Another definition of concentration is the proportion of the solute to the fluid or whole solution. Usually, mass per volume is used to define concentration.
What is an example of a concentrated solution?In a concentrated solution, the solute is present in the solvent at high quantities. Examples include orange juice, brine solution, and dark tea. To make a diluted solution, large amounts of the solvent are combined with little amounts of the solute. Examples include salt solution and light-colored tea.
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What a dehydration means?.
To solve such this we must know the concept of chemical reaction and dehydration reaction. Therefore, dehydration means to remove water from a compound.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Dehydration is a chemical process in which removal of water molecules from a compound take place using suitable reagent. The best reagent for dehydration can be any reagent that is water loving.
Therefore, dehydration means to remove water.
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What are the coefficients needed to balance the following equations?
1. ____NH3 + ____O2 → ____NO + ____H2O
2. _____ Al2O3 + _____C → _____Al + _____CO2
The balanced equation for the reaction of chromium metal and chlorine gas is 2Cr(s) + 3Cl2(g) → 2CrCl3(s) What is the limiting reactant when each of the following sets of quantities of reactants is mixed? (a) 4 Cr atoms and 6 Cl2 molecules (b) 6 Cr atoms and 10 Cl2 molecules (c) 12 Cr atoms and 20 Cl2 molecules
The limiting reactant in (a) 6 Cl2 (b) 10Cl2 (c) 20 Cl2
In the field of chemistry, a limiting reactant can be described as such a reactant molecule, that get consumed faster than the other reactants in a reaction and hence becomes the reason for the reaction to come to a stop.
In the reaction, 2Cr(s) + 3Cl2(g) → 2CrCl3(s), two atoms of Cr and 3 atoms of Cl2 are required for the reaction to occur. Hence, in all the options mentioned, Cl2 becomes the limiting agent as it is consumed in a larger amount in the reaction.
For the reactions to proceed, more Cl2 atoms need to be added.
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g which statement is true about a gated channel that allows sodium ions to enter the cell? a. it probably has a region containing an alpha helix b. it is a symport channel c. it is always open d. it needs atp to move sodium down its concentration gradient
A gated channel that allows sodium ions to enter the cell is always open.
This starts offevolved with the opening of voltage-gated Na+ channels within the neuron membrane. due to the fact the concentration of Na+ is higher outside the mobile than inside the cellular via a component of 10, ions will rush into the cell, driven by way of each the chemical and electric gradients.
Voltage-gated sodium channels play a vital role in the initiation and propagation of motion potentials in neurons and different electrically excitable cells consisting of myocytes and endocrine cells.
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which is the correct ksp expression for cr(oh)3(s) dissolving in water? which is the correct ksp expression for cr(oh)3(s) dissolving in water? ksp
The correct ksp expression for Cr(OH)₃(s) dissolving in water is ksp = [ Cr³⁺] [ OH⁻ ]³.
The ksp is called as the solubility product constant. The solubility product constant is the equilibrium constant for the solid substances that is dissolve the aqueous solution. the symbol for the solubility product constant is given as : ksp.
The equation for the Cr(OH)₃ is given as :
Cr(OH)₃ ⇄ Cr³⁺ + 3OH⁻
The ksp expression is given as :
ksp = [ Cr³⁺] [ OH⁻ ]³
Thus, The correct ksp expression for Cr(OH)₃(s) dissolving in water is ksp = [ Cr³⁺] [ OH⁻ ]³.
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Calculate the freezing point of a solution of 40.0 g methyl salicylate, c7h6o2, dissolved in 800. g of benzene, c6h6. kf for benzene is 5.10°c/m and the freezing point is 5.50°c for benzene.
The freezing point of a solution of 40.0 g methyl salicylate, C₇H₆O₂, dissolved in 800. g of benzene, C₆H₆ is 3.49°C
Since the problem statement gives the solution, the solute in the solution affects some of the properties of the whole system. These properties are called collective properties. To calculate the freezing point of a solution, use the freezing point depression equation expressed as:
ΔT = kf(m)i
where ΔTf represents the freezing point depression, kf is the constant for benzene, 4.90 C/m, i is the Van't Hoff coefficient, which is 1 because certain solutes do not dissociate into ions, and m is the molarity of the solution. Calculate as follows:
ΔT = kf(m)i
ΔT = 4.90 (40.00 / 0.800 (122.13)) (1)
ΔT = 2.01°C
ΔT = T - Tfs
Tfs = 5.5 - 2.01
Tfs = 3.49°C
Therefore, The freezing point of a solution of 40.0 g methyl salicylate, C₇H₆O₂, dissolved in 800 g of benzene, C₆H₆ is 3.49°C
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67 g cacl2 is dissolved in water to generate a 0. 50 m solution. What is the volume of the solution, in liters?
Divide the number of moles by the molarity in units of moles per liter to get the volume of a solution in liters given the number of moles and molarity.
How much volume does a solution have?Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.
Given the number of moles and molarity, get the volume of a solution in liters by dividing the number of moles by the molarity in units of moles per liter. A solution with 6.0 moles and a molarity of 3.0 moles per liter, for instance, has a volume of 2.0 moles per liter.
The following is the formula to determine a solution's percent volume/volume:
%U/v. Volume of solute/Volume of solution * 100
Determine the required percent v/v
0. 50 m /67 * 100
=7.462
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Answer:1.2L
Explanation:The Correct Answer
the oxygen in the air we breath is classified as: group of answer choices the solute in a heterogeneous gas-liquid mixture. the solute in a homogeneous gas mixture. the solvent in a homogeneous gas mixture. the solvent in a simple mixture. none of the above
The oxygen in the air that we breath is the solute in a hom---ogeneous gas mixture. And this is option C in the question.
What is oxygen?We know that oxygen is part of the gases that are involved in respiration. In the respiration of the animals, animals breath in oxygen and then breath out carbon dioxide. However, the oxygen is only one of the components of the air.
We have to know that air is a mixture of gases thus there are so many gases that compose air we can then say that the air is an example of a hom--ogeneous gas mixture since there are so many gases that are combined here.
Thus, the gas mixture can be seen as solution that does contain a mixture of gases and oxygen is one of those gases that are found in the mixture.
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Which characteristics determine an elements?.
The atomic number and the number the protons in an atom are the two characteristics that can be utilised to identify an element. Although it can vary depending just on atom in question.
What called elements?An element is a compound that cannot be changed into another substance. The roughly 100 elements each have a different type of atom. Every object in the universe has atoms out of at least one element and maybe more. The periodic table contains a list of every known element, with similar elements being grouped together.
Who invented the element?Russian chemist Dmitri Mendeleev created the framework for the modern periodic table in 1869, leaving blank spots for elements that were yet to be identified. He organised the elements into groups based on its atomic weight, rearranging them if he found that they simply does not fit.
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