Answer:
0.551 moles
Step-by-step explanation:
To calculate the number of moles in 22 grams of argon, divide the mass by the molar mass:
Number of moles = Mass / Molar mass
Number of moles = 22 g / 39.95 g/mol
Number of moles ≈ 0.551 moles
Therefore, there are approximately 0.551 moles of argon in 22 grams of argon.