sethmw13 sethmw13 15-03-2021 Chemistry contestada A flask contains a mixture of hydrogen gas and water vapor at STP. If the pressure of the water vapor is 19.5 mmHg, then what is the pressure of the hydrogen gas? 779 mmHg 779 mmHg 760 mmHg 760 mmHg 81.7 mmHg 81.7 mmHg 741 mmHg