STP

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STP

Postby expert007 » Wed 04 May, 2011 16:43

Imagine that you have two identical flasks, one containing
hydrogen at STP and the other containing oxygen
at STP. How can you tell which is which without
opening them?
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Re: STP

Postby little_scholar » Wed 04 May, 2011 16:45

The containers are identical. Both containers contain the same number of gas molecules. Weigh the containers. Because the molecular mass for `O_2` is greater than the molecular mass for `H_2`, the heavier container contains `O_2`.
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