During an experiment to produce H2O vapor, a student collects the following data: Pressure=719.2 mmHg, Volume=66 mL, Temperature=27.0 C. How many
moles of water vapor are produced? *
O 6.7 X10-1 mol
2.5 x 10-3 mol
0 3.5 x 10-1 mol
8.6 x 10-2 mol

I need help on how to also tell what equation to use in a question