# Answer to Question #57524 in General Chemistry for Tracy Guido

Question #57524

Did I do this right the answer does not seem right to me

A gas has a volume of 255 mL, a pressure of 733 mm Hg, a temperature of 548 ℃, and a mass of 1.22g. What is the molar mass?

pV = nRT

convert 733 mm Hg to atm = 733mm Hg x 1 atm/760mm Hg = 0.9645 atm

Convert C to K = 548 ℃ + 273.15 K = 821.15°K

Convert mL to L = 255mL x 1L/1000mL = 0.255L

0.9645 atm x 0.255L= n x 0.8206L*atm/mol*K x 821.15°K

0.2459/ 673.84 = n x 673.84/673.84

.000364 mol = n

M = m/n 1.22g/.000364 = 3351.648

A gas has a volume of 255 mL, a pressure of 733 mm Hg, a temperature of 548 ℃, and a mass of 1.22g. What is the molar mass?

pV = nRT

convert 733 mm Hg to atm = 733mm Hg x 1 atm/760mm Hg = 0.9645 atm

Convert C to K = 548 ℃ + 273.15 K = 821.15°K

Convert mL to L = 255mL x 1L/1000mL = 0.255L

0.9645 atm x 0.255L= n x 0.8206L*atm/mol*K x 821.15°K

0.2459/ 673.84 = n x 673.84/673.84

.000364 mol = n

M = m/n 1.22g/.000364 = 3351.648

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