Author Question: Carbon-14, which is present in all living tissue, radioactively decays via a first-order process. A ... (Read 24 times)

ENagel · **on:** Jul 8, 2021

Question 1

Calculate rate constant k for a first order reaction with a half-life of 75.0 min.
◦ 52.0 min^-1
◦ 1.54 × 10^-4 min^-1
◦ 1.33 × 10^-2 min^-1
◦ 9.24 × 10^-3 min^-1
◦ 2.67 × 10^-2 min^-1

Question 2

Carbon-14, which is present in all living tissue, radioactively decays via a first-order process. A one-gram sample of wood taken from a living tree gives a rate for carbon-14 decay of 13.6 counts per minute. If the half-life for carbon-14 is 5720 years, how old is a wood sample that gives a rate for carbon-14 decay of 11.9 counts per minute?
◦ 5.3 × 10^² yr
◦ 7.6 × 10^² yr
◦ 1.1 × 10^³ yr
◦ 9.4 × 10^³ yr

macmac · **Reply #1 on:** Jul 8, 2021

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