One liter of a certain gas at STP weighs 2.7 grams. What is the molar mass of the gas?



Answer:
(2.7grams/liter) (22.4liters/mole) = 60.48 grams/mole
First you must remember that any gas at room temperature is 24dm^3, which is 24000cm^3.

1 litre is actually (10X10X10) = 1000cm^3.
Unknown gas is 2.7g at this stage.

At room temperature, the gas= 24000/1000X2.7=64.8 grams/mole

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