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What is the molar mass of a gas that has a mass of 0.261 g in a 0.134 l vessel at 397 k, 0.992 atm? view available hint(s) what is the molar mass of a gas that has a mass of 0.261 g in a 0.134 l vessel at 397 k, 0.992 atm? 1.15 g/mol 9.49 × 103g/mol 64.0 g/mol 171 g/mol?

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isyllus

Answer: -

64.0 g/mol

Explanation: -

Volume V = 0.134 L

Pressure P = 0.992 atm

Temperature T = 397 K

Using the combined gas equation

PV = nRT

Number of moles n = [tex] \frac{PV}{RT} [/tex]

= [tex] \frac{0.992 atm x 0.134 L}{0.082 L atm K−1 mol−1 x 397 K} [/tex]

= 0.0041

Mass = 0.261 g

Molar mass = Mass / Number of moles

= [tex] \frac{0.261 g}{0.0041 mol} [/tex]

= 64.0 g / mol

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