Does gas pressure change for different .......True or false question?

15.0g of O2 gas in a 10.0L container has the same pressure as 15.0g of H2 gas in a 15.0L. Is this True???Does gas pressure change for different .......True or false question?
Moles O2 = 15.0 g/32 g/mol = 0.469


p = 0.469 x 0.0821 T/ 10 = 0.00385 T





Moles H2 = 15.0 g / 2.016 g/mol = 7.44


p = 7.44 x 0.0821 T / 15.0 = 0.407 T





At the same Temperature It is falseDoes gas pressure change for different .......True or false question?
No, its not true. Pressure of gas not only depends on temperature and volume, it also depends on the number of particles (not mass of particles). Here, 15.0g of oxygen gas would have:





15.0 (mass) / 32 (relative molecular mass) = 0.46875 moles of oxygen molecules





whereas 15.0g of hydrogen gas would have:





15.0 (mass) / 2 (relative molecular mass) = 7.5 moles of hydrogen molecules





Hence, for the same volume and assuming same temperature, gas pressure for 15.0g of hydrogen gas would be higher.
pV = nRT, so p = nRT/V If you assume T is constant, then you can work out the value of p in relation to this constant.





15g of O2 = 0.46875 moles O2





15g of H2 = 7.44048 moles H2





p = (0.46875 脳 RT)/10 = 0.046875RT for O2





p = (7.44048 脳 RT)/15 = 0.496032RT for H2





So assuming the temperature is constant, the pressures will not be equal.
It would depend on the temperature of the containers....

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