Question

guided practice the half - life of carbon - 14 is 5,730 years. if a sample of a substance was found to contain 50 grams of c - 14 in 2010, in what year would there be only 25 grams of c - 14 in the sample? a. 5730 b. 4875 c. 7740

Explanation:

Step1: Identify half-life definition

A half-life is the time for half the substance to decay. Here, 50g to 25g is one half-life.

Step2: Calculate target year

Add half-life to 2010: $2010 + 5730 = 7740$

Answer:

2010 + 5730 = 7740, so the correct option is C. 7740