Asked Nov 25, 2019

Determine the molecular weight (molar mass) of gases at STP which have densities of: 0.090 g/L


Expert Answer

Step 1

The gaseous state is the state of matter with least intermolecular force of attraction between molecules and highest kinetic energy. The standard properties of gases like Pressure, volume, and temperature can be calculated with the help of ideal gas equation.

The ideal gas equation can be written as:


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P x V Here n x R xT P Pressure V volume T temperature R gas constant n moles of gas

Step 2

Density and molar mass can also calculate with the help of ideal gas equation:


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P x V n x R x T mass mass R x T Рх. density molar mass density molar mass xR x T P

Step 3


Density = 0.090 g/L

R = 0.0821 L.atm/K.mol

T = 273...

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