Equal Volumes Ideal Gases: Same Temp, Pressure- A or C?

[Link]

"Equal volumes of different ideal gases at the same temperature and pressure must contain:"

A. The same number of atoms
B. one mole of each gas
C. The same amount of gas
D. 6.022 x 10^23 particles of each gas


Since it is not 24dm^3 of each gas, I can rule out B and D.

After rearranging the gas equation:

NRT/P = NRT/P

N = N

The molar ratios are equal, but i don't know which of A or C is correct since i don't see the difference.

 

[vincentchan]

helium molecule contain one atom, hydrogen molecule contain two atom...
and the N in your equation represent number of molecule...
so the answer is...

 

[Link]

Thank you!