What is the rate constant for the reaction 2a+b→c? (the initial rate was measured at several different reactant concentrations) [a](m) [b](m) initial rate (m/s) 0.05 0.05 0.035 0.10 0.05 0.14 0.20 0.10 1.12?

To find the rate constant we can write a rate expression for the following reaction:

2A + B → C

A rate expression is written as some rate constant multiplied by the concentrations of the reactants, with each concentration raised to the power of the molar coefficient. [A] has a coefficient of 2, and [B] has a coefficient of 1. Therefore, we get the following rate expression:

rate = k[A]²[B]

We are given a table of values and we can enter the three variable to solve for k.

k = (rate)/([A]²[B])
k = (0.035)/((0.05)²(0.05))
k = 280

We can confirm if the value for k is correct by using another set of concentrations, along with the rate constant and solve for the rate.

rate = 280 [0.10]²[0.05]
rate = 280 (0.01)(0.05)
rate = 0.14

The value we solved for agrees with the rate provided in the table, therefore we know our value for the rate constant is correct which is k = 280.

The answer is the first option just took the test

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic