Question

50 ng of a radioactive isotope with a half-life of 23
seconds is expected to decay exponentially. How much of the substance will remain after 10
seconds? Round your answer to the nearest tenth of a nanogram.(1 point)
Responses

0.4 ng
0.4 nanograms

37.0 ng
37.0 nanograms

0.7 ng
0.7 nanograms

20.0 ng

Answers

Answered by GPT 3.5
0.7 ng
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