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(2).

Step-by-step explanation:

We have the expression:

First, we can use the difference property of logarithms:

Hence, this is equivalent to:

We can rewrite the left as:

Now, we can use the power property:

Essentially, we move the exponent to the front.

Hence, this yields:

The natural log of e is simply 1. Hence:

Combine fractions:

Hence, our answer is (2).

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

answer: a and b

step-by-step explanation: