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The density of a gas is 2, relative to nitrogen, under the same conditions. The molecular weight of the gas is

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2.6

answer is C.

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Detailed Solution

$d_{gas} = 2 d_{N_{2}} \frac{d_{x}}{d_{N_{2}}} = \frac{M_{x}}{M_{N_{2}}} 2 = \frac{M_{x}}{28} M_{x} = 56 g$

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