Chemistry, 17.10.2019 12:00 michellemonchez103

An original sample of k-40 has a mass of 25.00 grams. after 3.9 × 109 years, 3.125 grams of the original sample remains unchanged. what
is the half-life of k-40?
(1) 1.3 × 109 y (3) 3.9 × 109 y
(2) 2.6 × 109 y (4) 1.2 × 1010 y

Answers: 1

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An original sample of k-40 has a mass of 25.00 grams. after 3.9 × 109 years, 3.125 grams of the orig...

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An original sample of k-40 has a mass of 25.00 grams. after 3.9 × 109 years, 3.125 grams of the original sample remains unchanged. what is the half-life of k-40? (1) 1.3 × 109 y (3) 3.9 × 109 y (2) 2.6 × 109 y (4) 1.2 × 1010 y

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Another question on Chemistry

An original sample of k-40 has a mass of 25.00 grams. after 3.9 × 109 years, 3.125 grams of the original sample remains unchanged. what
is the half-life of k-40?
(1) 1.3 × 109 y (3) 3.9 × 109 y
(2) 2.6 × 109 y (4) 1.2 × 1010 y