Posted by Christina on Saturday, November 10, 2012 at 8:59am.
Each of 2 front tires in the car is filled with a different gas. One tire contains 116 g of helium, another tire has 160 g of unknown gas. How many times heavier is a molecule of the unknown gas than an atom of helium?

Chemistry  Lyssy, Tuesday, November 22, 2016 at 10:21am
I have no idea
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