A sample of hydrogen gas has a volume of 8560 mL at a temperature of O°C and a pressure of 1.5 atm. Calculate the moles of H₂ present in this gas sample. The ideal gas constant, R = 0.0821 L-atm/mol-K A 0.047 mol B 5.7 x 10-3 mol C 0.57 mol D 5.7 mol