Methane gram molecular mass

Physical Properties.—Methane is a colorless and odorless gas. It is lighter than air and when pure may be readily liquefied. The weight of one liter of methane is o.7i46g. and 22.4 litres (gram molecular volume) weigh 16.00 g. It is, therefore, 7.952 times as heavy as hydrogen which, as may be recalled, weighs 0.08987 g. per liter. The density of methane is then 7.952, and its molecular mass is 16.00. 

Use atomic masses and numbers of each type of atom to determine molecular mass for methane. Express that molecular mass in grams per mole to determine molar mass. 

Strategy To calculate moles of CH4 from grams of CH, we must determine the conversion factor between grams and moles. To do that, we first need to calcnlate the molecular mass (and thus the molar mass) of methane by adding the appropriate atomic masses. 

Since the number 16.043 represents the mass of 1 mole of methane molecules, it makes sense to call it the molar mass for methane. However, tradi-A substance s molar mass (molecular tionally, the term molecular weight has been used to describe the mass of 1 weight) is the mass in grams of mole of a substance. Thus the terms molar mass and molecular weight mean... 

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