Unformatted text preview: However, m/V is the gas density d in units of grams per liter. Thus dRT P=----molar mass or dRT Molar mass = p (5.1) Thus, if the density of a gas at a given temperature and pressure is known, its molar mas can be calculated. The density of a gas was measured at 1.50 atm and 27°C and found to be 1.95 g/L. Cal-culate the molar mass of the gas. Solution Where are we going? • To determine the molar- mass of the gas What do we know? ,/ P = 1.50 atm ,/ T = 27°C + 273 = 300. K ,/ d = 1.95 g/L What information do we need? dRT ,/ Molar mass = -P ,/ R = 0.08206 L . atmlK . mol...
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- Spring '10
- Organic chemistry, 0.08206 L, 1.95 g, 2.47 L