If [N2O5]0 = 0.078 mol/L, what will be the

concentration of N2O5 after 1.2 s?
Answer in units of mol/L.

I'm not sure how to even set this up or which equatiosn to use?

To determine the concentration of N2O5 after a certain time period, we need to use the concept of reaction rate and the rate law equation.

The rate law equation provides the relationship between the rate of a chemical reaction and the concentration of reactants. Thus, we need to know the rate law for the reaction involved.

In this case, let's assume that the reaction of interest is the decomposition of N2O5, which can be represented as:
N2O5 -> 2NO2 + 0.5O2

The rate law for this reaction can be described as: Rate = k[N2O5]^m

Now, we need to determine the value of the rate constant (k) and the order of the reaction (m) to proceed with further calculations.

If this information is not given, we cannot accurately determine the concentration of N2O5 at a specific time.

To solve this problem, we need to use the concept of reaction rates and the given information.

The information provided in the question suggests that we are dealing with a chemical reaction where the concentration of N2O5 changes over time. To determine the concentration of N2O5 after a specific time, we need to know the rate at which the concentration of N2O5 changes over time. In other words, we need the rate equation for the reaction involving N2O5 to calculate its concentration at a given time.

Without specific information on the rate equation, we cannot directly solve this problem. However, we can proceed assuming a first-order reaction and use the integrated rate law to calculate the concentration at a specific time.

Assuming the reaction follows a first-order rate law, the integrated rate law equation is:

[N2O5]t = [N2O5]0 * exp(-kt)

Where:
[N2O5]t is the concentration of N2O5 at time t
[N2O5]0 is the initial concentration of N2O5
k is the rate constant of the reaction
t is the time

Given that [N2O5]0 is 0.078 mol/L and t is 1.2 seconds, we still need the rate constant k to calculate the concentration at this specific time.

If you have information about the rate constant or the reaction rate, please provide it so that we can proceed with the calculation.