What volume of H2 gas, in mL, would be occupied by 0.00465 moles of H2 gas at a temperature of 0 °C and a pressure of 760 mmHg?

Answer 1

V = nRT/P
you'll have to look up R (the gas comstant), T = 273 in Kelvin, and P must be converted to Pascals (unless you can find a gas constant in mmHg)