Problem: Use the molar volume of a gas at STP to calculate the density (in g/L) of oxygen gas at STP.

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We’re being asked to calculate the density (in g/L) of O2 gas at standard temperature and pressure.


Recall that density is the ratio of the mass and volume of an object:


density=massvolume



Also, recall that standard temperature and pressure (STP) is defined as 1 atm and 0 ˚C

We can use the ideal gas law to determine the volume occupied by 1 mole of any gas at STP:


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Problem Details

Use the molar volume of a gas at STP to calculate the density (in g/L) of oxygen gas at STP.