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Find a substance half-life in days. round your answer to the nearest tenths

Find a substance half-life in days. round your answer to the nearest tenths-example-1
User Rob Segal
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2 Answers

5 votes

Answer:

the answer is 4.5

Explanation:

,.........,............

User Hasina
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8.5k points
2 votes

Answer:

t=6.2days

Explanation:

Find a substance half-life in days. round your answer to the nearest tenths

k value=0.1124

N0=33 grams

since the questions says the time it takes for the substance to reduce to half of its size. the initial mass doesn't matter

N=N0e^-kt

N/N0=e^-kt

take laperian log of both sides

Ln(N/N0)=-kt

Ln(0.5)=-0.1124t

-0.693=-0.1124t

t=6.16

t=6.2days

Note: Half life is the time it takes for a radioactive material to reduce to half of its size/mass.

User Sidak
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