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science

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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 - ,

    IS IT.....C?

  • science - ,

    5g is 1/4 of 20g, so that's 2 half-lives

    2x24 = 48 minutes, so you are correct.

  • science - ,

    Hey! That's just what I'm trying to figure out! Maybe you ca help me!

  • science - ,

    i think its c but i'm not sure science is not my strong suit. this one is difficult.

  • science - ,

    Its c

  • science - ,

    i realy dont know

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