Okay, I've got this problem in my Chemistry class. It's about half-lifes and all that. If this is the wrong place to post this, then somebody can move it I guess.(adsbygoogle = window.adsbygoogle || []).push({});

I've got a 10.0 g sample of an unknown. They give me the following info, wanting me to plot it on a graph. That's the easy part.

Time(yr)---------------Mass(g)

0----------------------10.0

20---------------------6.50

39---------------------3.80

60---------------------2.20

80---------------------1.20

100--------------------0.500

So I graphed it, but now they want me to locate the time when the mass is 5.00 g. Of course, this is the half-life. But how to find it...?

Then I need to check again at 2.50 g, but I can handle that part if I can just get some help on the 5 grams part. Thanks.

Matthias

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# Simulation of Radioactive Decay

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