# If a sample of gas which weighs 0.400 g has a volume of 250 mL at STP, what is the molecular weight of the gas?

##### 1 Answer

Jun 4, 2016

#### Answer:

Approx.

#### Explanation:

The molar volume of an Ideal Gas at

We assume that the gas behaves ideally, and thus we multiply the given density

Given this molecular weight, the gas is quite possiby