A liter of air contains 9.2 × 10−4 mol argon. What is the mass of Ar in a liter of air? (AM=39.948g/mol)
To find the mass of Ar in a liter of air, we first need to calculate the mass of 9.2 × 10^-4 mol of Ar.
1 mole of Ar weighs 39.948 g.
Therefore, 9.2 × 10^-4 mol of Ar weighs:
9.2 × 10^-4 mol * 39.948 g/mol = 0.03679 g
So, the mass of Ar in a liter of air containing 9.2 × 10^-4 mol of Ar is 0.03679 g.