Posted by **Brittany** on Sunday, November 4, 2012 at 8:15pm.

Which one of these samples contains the smallest number of molecules?

a.

1.0 L of H2 at STP (0°C and 1atm)

d.

1.0 L of N2 at 0°C and 800 torr

b.

1.0 L of N2 at STP

e.

1.0 L of He at STP

c.

1.0 L of H2 at 20°C and 760 torr

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