An aqueous solution containing 35.5 g of an unknown molecular (non-electrolyte) compound in 158.6 g of water was found to have a freezing point of -1.4 ∘C. Therefore, 3.3 × 10² g/mol is the molecular mass.
What is molecular mass?The quantity of fill with a molecule is referred to as its molecular mass. It is also known as molecular weight.
It is computed by multiplying the mass for every atom by the amount of atoms belonging to the element that the molecule contains. Water, for example, is composed of two hydrogen atoms and one oxygen atom.
ΔT = i × Kf × m
m = ΔT / i × Kf
m = (1.4°C) / 1 × (1.86 °C/m) = 0.70 m
moles of solute = m × kg of solvent = 0.70 mol/kg × 0.1500 kg = 0.11 mol
M = 35.9 g/0.11 mol = 3.3 × 10² g/mol
Therefore, 3.3 × 10² g/mol is the molecular mass.
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Two perfumes are released at the same time. If one is standing 7.5 m from the point of release. Perfume A (molar mass 275 g/mol) and perfume B (molar mass 205 g/mol) at the same temperature. Which perfume will the person smell first? (show your working)
Answer:
perfume B
Explanation:
To determine which perfume a person will smell first, we need to determine the rate at which each perfume will travel to the person. The rate of a gas is proportional to the square root of its molar mass and the difference in partial pressures between the gas and the surroundings.
Since both perfumes are at the same temperature, the difference in partial pressures between the two perfumes will be the same. As a result, the perfume with the smaller molar mass (perfume B) will travel faster to the person and be smelled first.
Consider the chemical equation in equilibrium.
2H₂(g) + O₂(g) → 2H₂O(g)
What will happen if the pressure of the system is increased?
If the system's pressure is increased, the equilibrium will shift in the direction that decreases the total number of gas molecules in the system.
How does changing pressure affect the equilibrium?The effect of changing pressure on an equilibrium depends on the reaction's stoichiometry and the total number of moles of gas present in the system. For example, if the reaction produced more gas molecules on the product side, an increase in pressure would shift the equilibrium to the left, in the direction of the reactants.
What is stoichiometry?Stoichiometry is a branch of chemistry that deals with calculating the quantities of reactants and products involved in a chemical reaction. In any chemical reaction, the reactants combine to form products according to a specific chemical equation that shows the reaction's stoichiometry.
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The burning of 18.0 g of carbon produces 55.0 g of carbon dioxide. What is the theoretical yield of CO2? Then, calculate the percent yield of CO2. C + O2 → CO2
Theoretically, carbon dioxide can be produced by multiplying 0.139 moles of glucose by 6 moles of carbon dioxide per mole of glucose, which results in 0.834 moles of carbon dioxide.
What yield qualifies as theoretical?The theoretical yield of a chemical reaction is the volume of a product that is produced when a limiting reactant is completely converted. Because it indicates the product amount that would result from a perfect (theoretical) chemical reaction, it is not the same as that of the quantity that would actually acquire from a reaction in the lab.
What is the theoretical formula?Calculate its molar mass of a element by the weight of the compound, then multiply the result by 100 to determine the theoretical proportion of the element in the compound. The actual yield of a product in a chemical reaction is calculated by dividing it by the theoretical yield and multiplying the result by 100.
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What is the concentration of compound A if the absorbance of a solution containing compound A is 0.445? The molar absorptivity of compound A is 13.7 (M-1cm-1) and the light path of a cuvette is 1.00 cm.
The concentration of compound A is 0.0325 M.
What is Absorbance?In physics and chemistry, "absorbance" (also known as "optical density") is a measure of how much light is absorbed by a material as it passes through it. It is expressed as a logarithmic ratio of the intensity of the incident light (I0) to the intensity of the transmitted light (I), typically using the formula A = -log(I/I0). The absorbance of a material depends on its composition and the wavelength of the incident light. Absorbance is commonly used to quantify the concentration of a substance in a solution, using a spectrophotometer or other optical instrument that can measure the amount of light absorbed by the solution at a specific wavelength. The Beer-Lambert law states that there is a linear relationship between absorbance and concentration, making it a useful tool in analytical chemistry and biochemistry.
According to question:
The Beer-Lambert law relates the absorbance of a solution to the concentration of a compound and the path length of the cuvette:
A = εlc
where A is the absorbance, ε is the molar absorptivity, l is the path length, and c is the concentration.
To solve for the concentration, we can rearrange the equation:
c = A / (εl)
Substituting the given values:
c = 0.445 / (13.7 M^-1cm^-1 x 1.00 cm)
c = 0.0325 M
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The molar absorptivity of a compound at 500 nm wavelength is 252 M*1cm 1. Suppose one prepares a solution by dissolving 0.00140
moles of a solute in enough water to make a 500.0 mL solution. What would be the absorbance in a 4.00 mm pathlength cell?
Answer:
A = 252 * 0.04 * 0.0028 = 0.275584
Therefore, the absorbance of the solution in a 4.00 mm pathlength cell is approximately 0.28.
Explanation:
Answer:
0.28
Explanation:
The formula to calculate the absorbance of a solution is given by:
A = ε * l * c
Where:
A = absorbance
ε = molar absorptivity (L/mol cm)
l = pathlength (cm)
c = concentration (mol/L)
The molar absorptivity of the solute at 500 nm is 252 M^-1cm^-1, and the concentration of the solute in the solution is 0.00140 moles in 500.0 mL, so c = 0.00140 / 0.500 = 0.0028 M.
A = ε * l * c = 252 M^-1 cm^-1 * 4.00 mm * 0.00280 M = 2.16
So, the absorbance in a 4.00 mm pathlength cell would be 2.16.
How many moles are contained in 0.159 grams of aluminum sulfate, Al2(SO4)3?
0.159 grams of aluminum sulfate contains 0.000465 moles.
How to determine the number of moles of aluminum sulfate (Al2(SO4)3) in 0.159 gramsFirst we need to first calculate the molar mass of Al2(SO4)3.
Molar mass of Al2(SO4)3 = (2 x atomic mass of Al) + (3 x atomic mass of S) + (12 x atomic mass of O)
= (2 x 26.98 g/mol) + (3 x 32.06 g/mol) + (12 x 16.00 g/mol)
= 342.15 g/mol
Now, we can use the following formula to calculate the number of moles:
number of moles = mass / molar mass
Plugging in the values, we get:
number of moles = 0.159 g / 342.15 g/mol
number of moles = 0.000465 moles
Therefore, 0.159 grams of aluminum sulfate contains 0.000465 moles.
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A liquid sample of water (density = 0.9971 g/mL) has a volume of 10.00 mL. The water is allowed to freeze to become ice (density = 0.934 g/mL). What will be the volume of the
ice cube?
How many moles in 2.6 grams of Argon?
0.065 moles are there in 2.6 grams of Argon.
What is moles?
Moles, in chemistry, are a measure of the amount of a substance. One mole is equal to 6.022 x 10^23 particles or molecules of that substance. This number is known as Avogadro's number. Moles are used to measure the amount of a substance because it is easier to work with than counting individual particles or molecules. For example, it is easier to work with the number of moles of a substance than to count the individual atoms, molecules, or ions.
No. of moles =given mass/molar mass
Or,
n=w/m ______ (1)
So in this question we are given the value of w= 2.6 g
Now, the molar mass of argon is 39.948 g/mol
m=39.948 g/mol
So, substituting these values in equation (1) we get,
n= 2.6/ 39.948 = 0.065 mol
Therefore, 0.065 moles are in 2.6 grams of Argon.
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Write the balanced molecular equation, including phases, for the reaction of aqueous sodium phosphate with aqueous
iron(II) nitrate.
molecular equation:
The balanced molecular equation, including phases, for the reaction of aqueous sodium phosphate with aqueous iron(II) nitrate is given below:
molecular equation: Na₃PO₄ (aq) + 2 Fe(NO₃)₂ (aq) → 2 Fe₃(PO₄)₂ (s) + 6 NaNO₃ (aq)
What is a molecular equation?Molecular equations are a type of chemical equation that shows the chemical formulas of reactants and products without indicating the ionic behavior of the species. In other words, molecular equations do not show the dissociation of ionic compounds into their constituent ions in aqueous solutions. This type of equation is commonly used to represent reactions in solid-state or gas-phase.
The molecular equation for the reaction of aqueous sodium phosphate with aqueous iron(II) nitrate is:
Na₃PO₄ (aq) + 2 Fe(NO₃)₂ (aq) → 2 Fe₃(PO₄)₂ (s) + 6 NaNO₃ (aq)Learn more about molecular equations at: https://brainly.com/question/15960587
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In the first 13. 0 s of the reaction, 0. 018 mol of o2 is produced in a reaction vessel with a volume of 0. 380 l. What is the average rate of the reaction during this time interval?.
Answer:
the answer is 5
Explanation:becuase it is great for the society
What is the molar mass of iron in Daltons?
Answer:
The molar mass of iron (Fe) is approximately 55.845 g/mol or 55,845 Daltons.
Explanation:
Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ
How many moles of Al2S3 are
equivalent to 605 g Al2S3?
(Al2S3 = 150.17 g/mol)
? 1 mol Al₂S3
The number of moles of Al2S3 that would be equivalent to 605 g of the compound will be 4.03 moles.
Number of moles calculationThe number of moles in a particular mass of a compound is the ratio of the mass of the compound and the molar mass of the compound.
Mole = mass/molar mass
Molar mass of Al2S3 = 150.17
Mole of 605 g Al2S3 = 605/150.17
= 4.03 moles
In other words, the number of moles of 605 g Al2S3 is 4.03 moles.
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5. There are two types of bond cleavage: homolytic and heterolytic. In homolytic cleavage,
the two electrons in the bond are divided equally between the products. In heterolytic
cleavage, one atom gets both of the shared electrons. Show how the electrons in the
C-X bond in the compound L below are distributed in the bond cleavage to form:
a) Free radical
b) Carbocation
c) Carbanion
[6 marks]
C-X bond in the compound L below are distributed in the bond cleavage to form free radical.
How do bonds break?
When a bond is broken through heterolytic cleavage, also known as heterolysis, one of the fragments still has the shared pair of electrons from the original connection. Because it has both bonding electrons, one fragment acquires an electron while the other loses one. Another name for this procedure is ionic fission.
Any molecular species that has an unpaired electron in an atomic orbital and is capable of independent existence is referred to as a free radical. Most radicals exhibit certain similar characteristics when an unpaired electron is present. Many radicals are highly reactive and inherently unstable.
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What is the process of breaking down a compound into its individual elements called
Answer:Decompositiin
Explanation:
Answer:
decomposition
Explanation:
Decomposition is a chemical reaction where a compound breaks down into two or more simpler compounds or elements. The reverse process of decomposition is called synthesis or combination. In this process, two or more simple substances react to form a more complex compound. Decomposition reactions can be either spontaneous or induced by heat, light, or other forms of energy. Decomposition reactions are often used in industrial processes to extract metal from ore or to produce fertilizers and other products.
ALLEN
Arrange the following solutions in order by their decreasing freezing points: 0. 1 m na3po4, 0. 1 m c2h5oh, 0. 01 m co2, 0. 15 m nacl, and 0. 2 m cacl2.
The solutions can be arranged in order of decreasing freezing points as follows: 0.2 M CaCl2 > 0.15 M NaCl > 0.1 M Na3PO4 > 0.1 M C2H5OH > 0.01 M CO2
The freezing point of a solution is lowered by the presence of solute particles, and the degree of lowering is proportional to the concentration of the solute.
Based on the given concentrations, we can arrange the solutions in order of decreasing freezing points as follows:
0.2 M CaCl2: This solution has the highest concentration of solute particles, and therefore the lowest freezing point. Calcium chloride dissociates into three ions in solution, which contributes to a greater degree of freezing point depression.
0.15 M NaCl: This solution has a lower concentration of solute particles compared to CaCl2, but still has a significant effect on the freezing point of the solution.
0.1 M Na3PO4: This solution contains a polyatomic ion, which dissociates into four particles in solution, contributing to a greater degree of freezing point depression than a monatomic ion like NaCl.
0.1 M C2H5OH: This is a molecular solute that does not dissociate in solution, and therefore has a lower effect on the freezing point compared to ionic solutes.
0.01 M CO2: This is also a molecular solute, and has the lowest effect on the freezing point due to its low concentration.
In summary, the solutions can be arranged in order of decreasing freezing points as follows: 0.2 M CaCl2 > 0.15 M NaCl > 0.1 M Na3PO4 > 0.1 M C2H5OH > 0.01 M CO2.
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how many particles are in 0.431 moles of PF5
Taking into account the definition of Avogadro's Number, 2.5959×10²³ particles of PF₅ are present in 0.431 moles of PF₅.
Definition of Avogadro's NumberAvogadro's number is the number of constituent particles (usually atoms or molecules) found in one mole amount of substance. Therefore, it is the proportional factor that relates the molar mass of a substance to the mass of a sample.
Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Number of particles in this caseYou can apply the following rule of three: if 1 mole of PF₅ contains 6.023×10²³ particles, 0.431 mole of the compound contains how many particles?
amount of particles= (0.431 moles × 6.023×10²³ particles)÷ 1 mole
amount of particles= 2.5959×10²³ particles
Finally, 2.5959×10²³ particles of PF₅ are present.
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Which of the below choices represents the ranking with which molecules cross a synthetic membrane composed of phospholipids but not proteins? (Ranking in order from least easily to most easily)
a. hydrophobic molecules, small polar molecules, large polar molecules, ions
b. hydrophobic molecules, ions, small polar molecules, large polar molecules
c. ions, large polar molecules, small polar molecules, hydrophobic molecules
d. small polar molecules, large polar molecules, ions, hydrophobic molecules
A synthetic membrane made of phospholipids but lacking proteins permits the passage of hydrophobic molecules, small polar molecules, large polar molecules, and ions.
Transport is the term used to describe the movement of molecules within a cell from one location to another. Hydrophobic molecules, such as oxygen, are the first to cross a synthetic membrane made of phospholipids rather than protein, followed by small polar molecules like water, large polar molecules like glucose, and then ions, which may be sodium ions. Ions are the last to cross a membrane. If the hydrophobic molecules are small enough, they can easily flow through the plasma membrane because the inside of the membrane also despises water.
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See question in the picture below , will give brainliest for correct answer
The balanced equation for the chemical reaction is:
NH₄NO₃ -> N₂O + 2H₂O
How do I balance the chemical equation?The balancing chemical equation is done by doing a head count of the different element present on both sides of the equation to ensure the are the equal.
This however is in line with the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
Now, we shall the balance equation as shown below:
NH₄NO₃ -> N₂O + H₂O
There are 4 atoms of H on the left side and 2 on the right side. It can be balanecd by writing 2 before H₂O as shown below:
NH₄NO₃ -> N₂O + 2H₂O
Now the equationis balanced.
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One method for reclaiming silver metal from silver chloride results in a 94.6% yield. Calculate the actual mass of silver that can be produced in this reaction if 100.0 g of silver chloride is converted to silver metal. 2AgCl(s) → 2Ag(s) + Cl2(g)
If 100.0 g of silver chloride is converted, the amount of silver metal that would be produced would be 94.6 g.
What is mass?Mass is described as the quantitative measure of inertia which is a fundamental property of all matter.
The reaction formula ]provided is already balanced, therefore the molar ratio of silver chloride to silver metal is 1:1.
Therefore, if 100.0 g of silver chloride is converted, we can expect to produce 100.0 g of silver metal but the yield of the reaction is only 94.6%, which means that only 94.6 g of silver metal would actually be produced.
We can calculated as follows:
100.0 g × 0.946 = 94.6 g
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Imagine the following reaction of acetic acid with water is at equilibrium at 25 °C. (This reaction is
exothermic at this temperature.) It is then disturbed in one of the ways described below and allowed
to return to equilibrium. Select ALL correct answers for each of the multiple-choice questions below.
Some questions have more than one correct answer - check ALL of the correct answers.
3+2⇌3+ +3−
A.When strong acid is added,the concentration of hydronium ion immediately increases and after equilibrium ,the concentration of acetic acid will be higher than before disturbance. Therefore, option A and D are correct.
What is an acid ?A chemical that gives off hydrogen ions in water and forms salts by combining with certain metals are called as an acid.
B) The concentration of hydronium ion immediately decreases and after equilibrium ,the concentration of acetic acid will be lower than before the disturbance.
As when strong base is added ,the hydronium ions from acetic acid reacts with base and therefore, their concentration decreases ,also after equilibrium ,the concentration of acetic acid will be lower than before the disturbance by following Le Chatelier's principle
C)When the temperature is decreased the reaction will move in forward direction as it is an exothermic reaction and so after equilibrium ,the concentration of acetic acid will be lower than before.
D) Sodium acetate is a basic salt and when it is added to the solution,it will dissociate to formed acetate ions and sodium ions and by the common ion effect ,After equilibrium ,the concentration of acetic acid will be higher than before the disturbance.
Thus, When strong acid is added, it has a greater tendency to dissociate, and thus the concentration of hydronium ion increases immediately according to Le Chatelier's principle.
Also, as the concentration of strong acid increases after equilibrium, the concentration of acetic acid increases.
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Only few substances can be used as natural indicators. Why?
Answer:
Only few substances can be used as natural indicators because, some natural indicators do not have chemical properties which can change the color of substances.
Explanation:
Natural indicators are obtained from natural sources such as plants. Some of the common examples of natural indicators include red cabbage, turnip skin, cherries, beetroots and more. The natural indicators will help individuals distinguish if it is a base or an acid.
The half-life of Tl
-201 is 3.0 days. How many days will it take until the activity of the Tl
-201 in Simones body is one-fourth of the initial activity?
It will take approximately 4.39 days until the activity of the Tl-201 in Simone's body is one-fourth of the initial activity.
How does Half-Life Reaction work?The time it takes for half of a substance's radioactive nuclei to decay is known as its half-life. It is a radioactive substance is characteristic property that is used to determine a material's rate of decay. A decay curve that plots the number of radioactive atoms remaining over time can be used to determine a substance's half-life. Radiometric dating, nuclear medicine, and radiation safety all make use of half-life.
The decay of Tl-201 follows first-order kinetics. The equation for the decay of a radioactive substance is given by:
N = N0 × [tex]1/2^{t/t/2}[/tex]
where N is the amount of the substance at time t, N0 is the initial amount of the substance, t1/2 is the half-life of the substance, and t is the time that has elapsed.
We are given that the half-life of Tl-201 is 3.0 days. This means that if we start with an initial activity of A0, the activity at any time t is given by:
A = A0 * [tex]1/2^{t/3}[/tex]
We want to know how many days it will take until the activity of the Tl-201 in Simone's body is one-fourth of the initial activity. Let's call this time t₁ :
A = A 0/4
= A0 × (1/2)[tex]^{t^{1/3} }[/tex]
Dividing both sides by A0 and taking the logarithm of both sides, we get:
ln(1/4)
= - [tex]t^{1/3}[/tex] × log(2)
Solving for t₁, we get:
t₁ = (3/log(2)) × log(4)
= 4.39 days
Therefore, it will take approximately 4.39 days until the activity of the Tl-201 in Simone's body is one-fourth of the initial activity.
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Would aluminum be a positive or a negative charge if it just lost one valance electron?
An aluminium atom will be positive if it just lost one valence electron.
What is an ion?Ion is an atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
An ion is formed when an atom loses or gains electrons. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions.
According to this question, an aluminium atom is neutrally charged i.e. 0. However, when it loses an electron, it becomes positively charged.
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Which of the following conditions indicate an acidic solution at 25 °C? Select all that apply.
pOH = 9.66
pH = 4.25
[H+] > 1.0 x 10-7 M
[H+] > [OH-]
[OH-] > [H+]
[H+] > [OH-] of the following conditions indicate an acidic solution at 25 °C among the rest options.
Option C is correct.
What exactly is acidic solution?A solution with a pH of less than 7 is said to be acidic. A solution's acidity or basicity is measured on the pH scale, which ranges from 0 to 14. Solutions with a pH of 7 or higher are basic or alkaline, while solutions with a pH lower than 7 are acidic.
The presence of more hydrogen ions (H+) than hydroxide ions (OH-) in an acidic solution is a sign of its acidity. The degree to which an acid contributes hydrogen ions to a solution determines its strength. Acids are substances that do this.
Lemon juice, vinegar, and stomach acid are all common examples of solutions that are acidic. Acids can corrode metals and other materials and have a sour taste.
At 25°C, the following conditions indicate an acidic solution:
The condition pOH = 9.66 indicates a basic solution, and [OH-] > [H+] also indicates a basic solution.
pH = 4.25 [H+] > 1.0 x 10⁻⁷ M [H+] > [OH-]
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Pls answer asap 100 points
For the oxidation of glucose (C6H12O6 + 6O2→6H2O + 6CO2), how many liters of carbon dioxide gas(CO2) will be produced when 950 g of glucose(C6H12O6) is oxidized completely?
Molar Masses:
C6H12O6 = 180.2 g/mol
Question 3 options:
709g
571g
960g
480g
In the laboratory, a student dilutes 15.7 mL of a 11.8 M perchloric acid solution to a total volume of 200. mL. What is the concentration of the diluted solution?
? M
The concentration of the diluted solution is 0.92 M.
What is concentration?
Concentration refers to the amount of a substance present in a given volume or mass of a solution. It is typically expressed as the amount of solute per unit volume of solution or per unit mass of solvent.
To calculate the concentration of the diluted solution, we need to use the formula:
C1V1 = C2V2
where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
Plugging in the values given, we get:
C1 = 11.8 M
V1 = 15.7 mL
V2 = 200 mL
We want to find C2, so we rearrange the formula to solve for C2:
C2 = (C1 x V1) / V2
Substituting the values, we get:
C2 = (11.8 M x 15.7 mL) / 200 mL
C2 = 0.92 M
Therefore, the concentration of the diluted solution is 0.92 M.
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what is the main function of the chloroplasts in a plant cell
Answer:
The main function of chloroplast in a plant is to prepare food for the plant, by the process of photosynthetic in the plant cell
Chloroplast contains a green pigment
Explanation:
Answer:
The main function of chloroplasts in a plant cell is to perform photosynthesis. Chloroplasts contain chlorophyll, which absorbs light energy and converts it into chemical energy through a process called the light-dependent reactions. The chemical energy is then used to produce glucose and other sugars from carbon dioxide and water in a process called the light-independent reactions or the Calvin cycle. This process provides the plant with its energy source, as well as produces oxygen as a by-product.
Explanation:
The following are the conjugate bases of some strong and weak acids. Which of these would you expect to act as a base if placed in aqueous solution? (1) HCOO (ii) HCO3 (iii) HSO4 (iv) H2PO4 (v) Br" (vi) F a.(i),(ii),(iv), and (vi) onlyb. (i),(ii),(iii),(iv), and (vi) onlyc. (iii) onlyd. (i),(ii),(iii),(iv) onlye. all of them
Due to the strength of their conjugate acids, I would anticipate that I (ii), (iv), and (vi) would behave as bases if put in an aqueous solution. As both alternatives (a) and (d) contain the conjugate bases of weak acids, they are both accurate.
Strong acids' conjugate bases, such as (v) Br- and (vi) F-, cannot take any more protons since they are already fully deprotonated and cannot function as bases in aqueous solutions. Strong acids have conjugate bases that may receive protons and function as bases in aqueous solutions. These bases include I HCOO-, (ii) HCO3-, (iii) HSO4-, and (iv) H2PO4-. As both alternatives (a) and (d) contain the conjugate bases of weak acids, they are both accurate. Because (v) and (vi), which are conjugate bases of strong acids and cannot function as bases, are included in Option (b), it is wrong. Option (c) is untrue because it only accounts for the conjugate bases of strong acids and ignores those of weak acids.
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state and explain Five causes of accidents in science laboratory
Explanation:
Chemical hazards: Handling toxic substances can cause irritation and carcinogenicity.
Biological hazards: Biological hazards include hazards from working with small animals, working with bloodborne pathogens and working with biological agents, such as viruses and bacteria.
Physical hazards: Physical hazards include exposure to noise, poor posture and the explosibility and flammability of substances.
Safety hazards: Safety hazards include unbalanced centrifuges, danger when handling hot sterilized items and electrical hazards, such as shock, explosions, blasts and electrocutions.
Allergy hazards: A common allergy hazard in the laboratory setting is a latex allergy, as many of the materials used in a laboratory setting are latex.
Dangers in the laboratory setting can also come from unsafe practices, including:
Working alone in the laboratory
Neglecting to wear a lab coat
Lack of safety training
A student sets up two reactions. Reaction 1 uses 0.210 mol/L of reactant, and Reaction 2 uses 0.510 mol/L of
reactant. How many times faster is Reaction 2 compared to Reaction 1?
The relationship between rate and reactant concentration is given by the rate equation. Here reaction 2 is 2.4289 times faster than 1.
What is rate equation?An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentrations of the reactants that determine the rate of a reaction is called the rate equation.
Rate ∝ concentration
Rate = k [ concentration ]
Rate₁ / Rate₂ = k [conc]₁ / [conc]₂
= k × 0.210 / k × 0.510
= 0.4117
Rate₁ = 0.4117 × Rate₂
Rate₁ / 0.4117 = Rate₂
2.4289 × Rate₁ = Rate₂
Thus reaction 2 is 2.4289 times faster compared to reaction 1.
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