Answer to Question #203789 in General Chemistry for lea

Question #203789

A sample of gas has a mass of 38.7 mg. Its volume is 220 mL at a temperature of 54 ∘C and a pressure of 897 torr. Find the molar mass of the gas. Express your answer in grams per mole to three significant figures. 



1
Expert's answer
2021-06-07T03:12:57-0400

m=38.7 mg=

V=220 mL= 0.22 L

T = 54 + 273 = 327 K

p = 897 torr = 1.18 atm

Ideal Gas Law

pV = nRT

R= 0.08206 L×atm/mol×K

Molar mass

Answer: 4.00 g/mol


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