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What is the molar mass of the gas?

What is the molar mass of the gas?

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    PV = nRT we know that moles (n) = mass (m) / molar mass (Mw) substitute this into the ideal gas equation and we get PV = mRT / Mw Use 1 L for your calculations, 1L has a mass of 1.95 g (density tells us this) P = 1.24 atm V = 1.00 L m = 1.95g Mw = molar mass = ? g/mol R = 0.082057 Latmmol^-1K^-1 T = temp in Kelvin = 341.85 =68.7 + 273.15 solve for molar mass Mw = mRT / PV = 1.95 g x 0.082057 Latmmol^-1K^-1 x 341.85 K / (1.24 atm x 1.00 L) = 44.11 g/mol

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PV = nRT we know that moles (n) = mass (m) / molar mass (Mw) substitute this into the ideal gas equation and we get PV = mRT / Mw Use 1 L for your calculations, 1L has a mass of 1.95 g (density tells us this) P = 1.24 atm V = 1.00 L m = 1.95g Mw = molar mass = ? g/mol R = 0.082057 Latmmol^-1K^-1 T = temp in Kelvin = 341.85 =68.7 + 273.15 solve for molar mass Mw = mRT / PV = 1.95 g x 0.082057 Latmmol^-1K^-1 x 341.85 K / (1.24 atm x 1.00 L) = 44.11 g/mol

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