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calculate the density of a gas mixture?
the total molar mass is 13.68g/mol (gas= CO2, N2, & He). what is the density of the gas at 38 degrees celsuis and a pressure of 744 mm Hg?
1 Answer
- JohnLv 79 years agoFavorite Answer
For this problem, we will have to use the universal gas law: PV = nRT. n = moles and moles = m/MM so.... PV = mRT/MM. Now density is m/V. Rearrange the formula to solve for density (m/V).
m/V = (P x MM) / (R x T) ---> [744 mm Hg x (1 atm / 760 mm Hg ) x 13.68-g/mol] / [0.0821-L*atm/mol*K x (38 oC + 273)] ---> 13.392-atm*g/mol / 25.53-L*atm/mol ---> 0.525-g/L
