Question
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
20.0 ng
20.0 nanograms
37.0 ng
37.0 nanograms
0.4 ng
0.4 nanograms
0.7 ng
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
20.0 ng
20.0 nanograms
37.0 ng
37.0 nanograms
0.4 ng
0.4 nanograms
0.7 ng
Answers
GPT 3.5
0.7 ng