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Strontium-90 has a half-life of about 28 years. After 112 years, how many grams of a 50 g sample will remain? a. 3.125 g b. 6.25 g c. 12.5 g d. 42.0 g

Strontium-90 has a half-life of about 28 years. After 112 years, how many grams of a 50 g sample will remain? a. 3.125 g b. 6.25 g c. 12.5 g d. 42.0 g
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Strontium-90 has a half-life of about 28 years. After 112 years, how many grams of a 50 g sample will remain?

a. 3.125 g
b. 6.25 g
c. 12.5 g
d. 42.0 g

User Mridul Vishal
by
7.6k points

2 Answers

2 votes

Answer:

3.125G

Explanation:


User Efthimio
by
7.9k points
5 votes
112 = 4 * 28 so the factor is (1/2)^4 = 1/16
Number of grams remaining = 50 * 1/16 = 3.125

Its a
User Mazix
by
8.4k points
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