The density of a gas is 1.964 g dm^(-3) ...

The density of a gas is 1.964 g `dm^(-3)` at 273 K and 76 cm Hg. The gas is

A

`CH_(4)`

B

`C_(2)H_(6)`

C

`CO_(2)`

D

Xe

Text Solution

Verified by Experts

The correct Answer is:

C

`M=d(RT)/(P)`
`=((1.964" g "dm^(-3))(0.0821" dm"^(3)" atm "K^(-1)" mol"^(-1))(273K))/(76//76" atm")`
`=44" g "mol^(-1)`
Hence, the gas is `CO_(2)`.

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