A sample of gas weighing 0.0286 g occupies a volume of 50 #cm^3# at 76 cmHg. and 25 degree centigrade. What is the molar mass of the gas?
1 Answer
Explanation:
We can find the molar mass
where

#d# is the density of the gas, in#"g/L"# 
#R# is the universal gas constant, equal to#0.082057("L"•"atm")/("mol"•"K")# 
#T# is the absolute temperature of the gas, in#"K"# 
#P# is the pressure of the gas, in#"atm"#
We need to convert some units to get where we need to be. Let's do the density first.
Degrees centigrade is the same as degrees Celsius, so let's convert this to
Lastly, let's convert our pressure, which is in centimeters of mercury:
Now that we have all our values, let's plug them into the equation: