# Chemistry

What would the units of the rate constant k be in a second order equation if rate was measured in mol/(L x s)and all concentrations in mol/L

a)L/(mol x s)
b)L2/(mol2 x s)
c)L3/(mol3 x s)
d)mol2/(L2 x s)

I think it's b) but d) is very tempting

1. 👍
2. 👎
3. 👁
1. rate = k(A)2 is the rate equation for a second order reaction.

rate = mol/L*s
concn = moles/L

mol/L*s = k(mol/L)^2

solve for k. Multiply both sides by L^2/mol^2 which should give you
(mol/L*s)x(L^2/mol^2) = ??. I don't think it is b or d.

Here is a site that gives the answer but not exactly how to do it.
http://en.wikipedia.org/wiki/Rate_equation#Summary_for_reaction_orders_0.2C_1.2C_2_and_n

1. 👍
2. 👎
2. Don't you mean divide?

Don't you get
L^2mol /mol^2 Lxs

The thing is idk if it can be reduced to
L/molxs or A)

Can it?

1. 👍
2. 👎

## Similar Questions

1. ### Chemistry

At a given temperature, a first-order reaction has a rate constant of 3.5 ´ 10–3 s–1. How long will it take for the reaction to be 24% complete? A chemical reaction that is first-order in X is observed to have a rate constant

2. ### Chemistry

Nitrogen Monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). (i). write a balanced equation for this reaction. (ii). The reaction is experimentally found to be (approx) first-order in H2 and second order in

3. ### chemistry

disappearance of NO in ...- Help!!!? The following data were collected for the rate of disappearance of NO in the reaction 2 NO(g) + O2(g) ¨ 2 NO2(g). Run: [NO](M) [O2](M) Initail Rate (M/s) 1 .0126 .0125 1.41 X 10^-2 2 .0252

4. ### chemistry

Determine the overall orders of the reactions to which the following rate laws apply: a. rate = k[NO2]^2 b. rate = k c. rate = k[H2][Br2]^1/2 d. rate = k[NO]^2[O2] I think the answers are: a. Second Order b. Zero Order c. First

1. ### Chemistry

A first order reaction ABC → AB + C has a rate constant of 0.0125 /s. If the initial concentration of ABC is 0.500 M, what is the concentration of ABC after 5 minutes? Note: do not include units in your answer, do not use

2. ### Chemistry

A student performs the reaction below in three experiments studying initial concentrations and initial rates. The data is summarised in the table below. Show all your work. 2 NO(g) + Br2(g) → 2 NOBr(g) a. What is the order of

3. ### chemistry

A student performed two side-by-side reactions to test the decomposition of N2O5. The only difference between the two reactions was reactant concentration — reaction 1 started with 2 M N2O5 and reaction 2 started with 1.2 M.

4. ### chemistry

The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 8.56× 10–10 cm3·molecule–1·s –1 at 298 K. convert to units of M-1 s-1. convert rate

1. ### science

Which of the following terms are present in the rate law? A. The rate constant, the concentration of the reactants, and the order of the reactants B. The rate constant and the concentration of the reactants C. The rate constant

2. ### Chemistry

The rate equation for the hydrolysis of sucrose to fructose and glucose is first order. After 27 minutes the sucrose concentration decreased from 0.0146M to 0.0132M. Find the rate constant K. Please help me!

3. ### chemistry help?!

Which statement correctly pairs the order of a reaction with the units for the rate constant? A. third order; s/M B. zero order; 1/(M2) C. second order; 1/(M•s) D. first order; 1/M

4. ### chemistry

The units of a rate constant for zero, first and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? a. 1/min3 b. mol2/L2-min c.