The mass of 3.33 moles of air at standard temperature and pressure (STP) would be 96.47 g
The mass of a substance is the product of the number of moles in that substance and the molar mass.
In other words:
mass = mole x molar mass
The mole of air at STP is given as 3.33 while its molar mass is given as 28.97 g/mol.
Therefore;
mass of air at STP = 3.33 x 28.97
= 96.47 g
More on calculating mole number can be found here: https://brainly.com/question/12513822
