Homework Help: chem

Posted by hannah on Thursday, February 10, 2011 at 12:07pm.

i need help on this question:

Equal masses of gaseous N2 and Ar are placed in separate flasks of equal volume at the same temperature. Tell whether each of the following statements is true or false.

a) There are more molecules of N2 are present than atoms of Ar.

true or false. how do i know which has more?

chem - DrBob222, Thursday, February 10, 2011 at 5:02pm
Why not take some number (any number you want to use, say 40 g). Calculate moles N2 and moles Ar.
moles N2 = 40/28 = about 1.4 so that x2 x 6.02E23 will be the # atoms N present.
moles Ar = 40/39.9 = 1.002 and that x 6.02E23 will be the # atoms Ar.
Which is larger?

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