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[biochemistry girl]

Calculate the mass, in grams, of 2.74 L of CO gas measured at 33°C and 945 mmHg.


A. 0.263 g
B. 2.46 g
C. 3.80 g
D. 35.2 g
E. 206 g

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Determine the molar mass of chloroform gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm3 at 97°C. The pressure of the chloroform is 728 mmHg.


A. 187 g/mol
B. 121 g/mol
C. 112 g/mol
D. 31.6 g/mol
E. 8.28 ´ 10-3 g/mol

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What is the molar mass of Freon-11 gas if its density is 6.13 g/L at STP?


A. 0.274 g/mol
B. 3.64 g/mol
C. 78.2 g/mol
D. 137 g/mol
E. 365 g/mol

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A mixture of three gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar?


A. 0.258 atm
B. 301 mmHg
C. 356 mmHg
D. 5,345 mmHg
E. 8,020 mmHg