Half-life question..

Question

Which statement below regarding the half-life of a zeroth-order reaction is true?

a) each half-life is half as long as the preceding half-life

b) the half-life remains unchanged throughout the course of the reaction

c) each half-life is twice as long as the preceding half-life

d) each half-life is four times as long as the preceding half-life

please explain if possible..

Answer 1

The answer is B.

For example if a chemical has a half-life of two days, then every two days the amount of the chemical is cut in half.

If you start with 10 units of the chemical in two days it will be 5 units.

In two more days it will be 2 1/2 units.

In two more days it will be 1 1/4 units.

And it will keep going until the number is so small, the chemical is considered nonexistent.