Question

During an experiment performed at 30.0 °C and 770 mm Hg, 525 mL of hydrogen gas is collected in a pneumatic trough. If the partial pressure of water at the test temperature was 31.8 mm Hg, how many moles of hydrogen was collected?

Answer 1

At 30°c and 770 mm Hg. Sa soc and 770 mm Hg. 525 ml of Hydrogen Gas is collected a preumatic trough . Pastial pressure of wates at the test temperature - 31.8 mmHg. Pressure due to Hydrogen Aas = 770 monthy - 31.8 mm Hg Pressure due to Hydrogen Gas= 738.2 mm Hg. Use Idreal Cas Equation: TPV = nRT P-pressure (atm) V=Volume (L) na mole R=0.08.2017 atom-L R = Universal Gas Constant Ja Temperature mol k T= 30° = 303.15k P = 738.2 mmHg = 0.9 71 afm. Volume (V) = 525 ml = 0.525L Let's say, Molesof Hydrogen collected="s" = (0.971 atti) (0-525x) = m (0-182 057 gallon(303,45¥) molk n = 0.97180.525 -mole 0.082057 x 303.15 > n = 0.0205 mol $10.0205 moles of Hydrogen was collected.