# How to convert molecular weight to density?

1. Multiply both sides of the ideal gas equation PV = (m/M) x RT by the value M/RTV to obtain the following expression for the density: Density = m/V= PM / RT. 2. Round the molar gas constant R to the fourth digit to obtain 8.3145 J/mole x K; this pr
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 Numerous sources give the number of molecules of air per liter, at STP, as approximately 2.5E22. A liter contains 1E3 cubic centimeters, and a cubic meter contains 1E6 cubic centimeters http://wiki.answers.com/Q/What_is_the_Molecular_De...
 the ratio between the mass of one mole of a substance and its volume is the molecular density. http://wiki.answers.com/Q/What_is_molecular_densit...
 1. Write this equation for converting the molecular weight of gas into its density: Density of gas = molecular weight / 22.4 liters per mole. This works because molecular weight is http://www.ehow.com/how_6385888_calculate-density-...
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