Register
Potassium-42 has a half-life of 12.4 hours. How much of a 746-gram sample will be left after 62 hours? A 23.31 g B 56.82 g C 51.87 g D 74.6 g
38.1k views
6 votes
Potassium-42 has a half-life of 12.4 hours. How much of a 746-gram sample will be left after 62 hours?

A 23.31 g
B 56.82 g
C 51.87 g
D 74.6 g

User David Kamer
by
5.1k points

1 Answer

5 votes
I think A or 23.31 is the answer. Because 62/12.4=5. And then divided 746 by half and then with that answer divide it again and keep doing this 5 times. You should get 23.31
User David Ferrand
by
5.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.3m questions

6.9m answers

Other Questions

Pizza planet is running a special 3 pizzas for 16.50. What is the unit rate for one pizza
What number is halfway between 0 and 18
If the 9-inch wheel of cheese costs $18.60, what is the cost per square inch? If the cost is less than a dollar, put a zero to the left of the decimal point?
how long Will it take for $7000 investment to grow to $7553 and the annual rate of 3.4% compounded quarterly assume that no withdrawals are made
I need to simplify this expression.
Link Copied!