Question

In: Chemistry

A 23.0 gram sample of a gas occupies 11.2 Liters of volume at standard temperature and...

A 23.0 gram sample of a gas occupies 11.2 Liters of volume at standard temperature and pressure. The identity of this gas is mostly likely which of the following gases?

A.

NO2

B.

CS2

C.

CH3F

D.

Ar

E.

CH2Cl2

Solutions

Expert Solution

From mole concept & Avogadro Law:- 22.4 Liters of any gas contains 1 mol of gas at Standard temperature pressure.

So 11.2 Liters of gas has = 1/2 mol of gas

Given that 11.2 Liters of gas has mass = 23 grams

That means 1/2 mol of gas has mass = 23 grams

So 1 mol of gas has mass = 23 x 2 = 46 grams

So the molar mass of unknown gas is equal to 46 grams

Now from options, NO2 has molar mass 46. So Unknown gas will be NO2 ( Nitrogen dioxide ).

For more detailed work, please refer to the image attached below.


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