Question

a sample of gas is collected over water at a temperature of 35 degrees celcius when the barometric pressure reading is 742.0 torr what is the partial pressure of the dry gas?

Answer 1

Ptotal = Pgas + PH2O.
Look up the vapor pressure of water at 35 C, Ptotal is 742, calculate Pgas.
By the way, note the correct spelling of celsius.

Answer 2

707