100 ml of O 2 g effuse from a porous container in 100 sec . 75 ml of unknown gas effuses under the same conditions of temperature and pressure in 150 sec . Calculate vapour density of unknown gas?

Question

100 ml of O 2 g effuse from a porous container in 100 sec . 75 ml of unknown gas effuses under the same conditions of temperature and pressure in 150 sec . Calculate vapour density of unknown gas?, 16, 32, 64, 128

MARKS App · Accepted Answer

r o 2 r u n k n o w n = v 1 t 1 v 2 t 2 = M u n k n o w n M o 2 ⇒ 100 × 150 100 × 75 = M unknown 32 ⇒ M unknown = 128 ∴ V .D . = 128 2 = 64

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