# Answer to Question #57465 in General Chemistry for Tracy Guido

Question #57465

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? using pV = nRT

Expert's answer

V = 255 mL = 0,255*10–3 m3

p = 733 mm Hg = 97 725 Pa

T = 548 ℃ = 821 К

m = 1,22 g = 1,22*10–3 kg

R = 8,314

n = m/M; M = mRT/pV

M = 1,22*10–3 *8,314*821/97 725*0,255*10–3 = 0,334 kg/mol

p = 733 mm Hg = 97 725 Pa

T = 548 ℃ = 821 К

m = 1,22 g = 1,22*10–3 kg

R = 8,314

n = m/M; M = mRT/pV

M = 1,22*10–3 *8,314*821/97 725*0,255*10–3 = 0,334 kg/mol

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## Comments

Assignment Expert25.01.16, 14:24Dear Tracy Guido

Please read answer.

Best regards

Assignment Expert25.01.16, 14:24Dear Tracy Guido

Please read answer.

Best regards

Tracy Guido25.01.16, 02:23A 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?

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