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2.9 g of a gas at 95 °C occupied the same volume as 0.184 g of dihydrogen at 17 °C, at the same pressure. What is the molar mass of the gas?

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asked Oct 5, 2017 in Chemistry by jisu zahaan (28,760 points) ● 26 ● 371 ● 800

2.9 g of a gas at 95 °C occupied the same volume as 0.184 g of dihydrogen at 17 °C, at the same pressure. What is the molar mass of the gas? 

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+1 vote
answered Oct 5, 2017 by sforrest072 (157,439 points) ● 60 ● 409 ● 930
selected Oct 5, 2017 by sanjeev
 
Best answer

Volume (V) occupied by dihydrogen is given by, 

Let M be the molar mass of the unknown gas. Volume (V) occupied by the unknown gas can be calculated as

According to the question, 

Hence, the molar mass of the gas is 40 g mol–1 . : 

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