A liter of air contains 7.2 x 10 to the power -5 mol of Argon (Ar). What is the mass of Ar in a liter of air?
A liter of air contains 7.2 x 10 to the power -5 mol of Argon (Ar). What is the mass of Ar in a liter of air?
mass Ar = moles Ar x molar mass Ar
To find the mass of Argon (Ar) in a liter of air, we need to know the molar mass of Argon and the number of moles of Argon present.
The molar mass of Argon (Ar) is approximately 39.95 grams/mole.
Given that there are 7.2 x 10^-5 moles of Argon in a liter of air, we can calculate the mass of Argon using the following equation:
Mass = Number of moles * Molar mass
Substituting the values:
Mass = (7.2 x 10^-5 moles) * (39.95 grams/mole)
Mass = 2.880 x 10^-3 grams
Therefore, the mass of Argon in a liter of air is approximately 2.880 x 10^-3 grams.