Question

A mixture of nitrogen gas and water vapour axis contained in a gas cylinder and the pressure of the gas mixture was found to be 942mmHg, what is the pressure exerted from the water vapour if the partial pressure exerted by the nitrogen gas is 797mmHg.
What's water vapor "axis"?
Ptotal = pN2 + pH2O
You now Ptotal and pN2, solve for pH2O
A gaseous sample weighing 0.896g was found to occupy a volume of 0.524dm3 at 0.96atm and 28°C
1. What is the molar mass of the gas
2. What gas is it
Use PV = nRT. You know P, V, R (use 0.08206 dm^3*atm/mol*K) and T (remember to convert degrees C to kelvin). Solve for n = number of mols.
Then n = grams/molar mass. Knowing n and grams, calculate molar mass).
I'll leave it to you to figure out the gas.

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