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!!!!

13 answers

IS IT.....C?
5g is 1/4 of 20g, so that's 2 half-lives

2x24 = 48 minutes, so you are correct.
Hey! That's just what I'm trying to figure out! Maybe you ca help me!
i think its c but i'm not sure science is not my strong suit. this one is difficult.
Its c
i realy dont know
Answers are
b
d
d
c 100%
masta yoda is true
b
d
d
c
B
D
D
C
Is right!
4/4 100% B,D,D,C
B
D
D
C
4/4 100%
for me it was
A,D,D,C so if you want a 100% copy me
B
D
D
C
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