In an experiment during the analysis of carbon compound 145 c m 3 of H 2 was collected at 760 mm Hg pressure and 27 ° C temperature. The weight of H 2 is nearly

Question

In an experiment during the analysis of carbon compound 145 c m 3 of H 2 was collected at 760 mm Hg pressure and 27 ° C temperature. The weight of H 2 is nearly, 10 mg, 12 mg, 24 mg, 6 mg

MARKS App · Accepted Answer

n = P V / R T P = 760 mm, Hg = 1 atm V = 145 cm 3 = 0 .145 L T = 27 + 273 K = 300 K R = 0.0821 L atm m o l - 1 K - 1 So n = 1 atm × 0 .145 L 0 .082 L atm mol − 1 K − 1 300 K = 5.9 × 1 0 - 3 mol So weight of H 2 = 5 .9 × 10 − 3 mol × 2 g 1 mol = 11 .8 mg ≈ 12 mg .

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