Posted by **amor** on Wednesday, September 25, 2013 at 10:34pm.

If the half-life of a 20.0g is known to be 24 minutes, how long will it take for only 5.0 grams of the sample to remain

A.6 minutes

B.24 minutes

C.48 minutes

D.96 minutes

I NEED HELP!!!!

- science -
**amor**, Wednesday, September 25, 2013 at 10:36pm
IS IT.....C?

- science -
**Steve**, Thursday, September 26, 2013 at 5:34am
5g is 1/4 of 20g, so that's 2 half-lives

2x24 = 48 minutes, so you are correct.

- science -
**Mackenzie**, Wednesday, January 14, 2015 at 9:35pm
Hey! That's just what I'm trying to figure out! Maybe you ca help me!

- science -
**maddie**, Monday, March 23, 2015 at 12:09pm
i think its c but i'm not sure science is not my strong suit. this one is difficult.

- science -
**Anonymous**, Thursday, October 13, 2016 at 1:30pm
Its c

## Answer This Question

## Related Questions

- Science- Radioactive Dating - Which of the following statements about ...
- math - 6. If each of eight biology classrooms is in use for 5 hours and 15 ...
- Physical Science - Here are some half-lives for different isotopes of bismuth (...
- math - use : .# x 6 = minutes I did try to do it but came up with numbers like 5...
- Half-Life - Can someone please show me a detailed solution to this problem? ...
- Half-Lifes - How much of a 6gram sample of silver-105m would remain after 4 ...
- Chemistry - How much of a 50.0 grams sample of Uranium-238 would remain after 26...
- stat - An oil change company advertises that they can change the oil in your car...
- math - Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do ...
- math - charlie used his cell phone for a total of 1216 minutes in one month. if ...

More Related Questions