## THIS USER ASKED ๐

**Refer to Figure 13-2 and determine how much parent material will be left after five half-lives.
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## THIS IS THE BEST ANSWER ๐

Explanation: This is a type of radioactive decay and the entire radioactive process follows first order kinetics.

Half-life is the time required to decompose half of the reactants. so after each half – life the reactant decomposes to half its present value.

Now, to calculate the number of half-lives, we use the formula:

where,

amount of reactant left after half – life.

= Let Initial amount of reactant = 100 g

number of half – lives

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