What volume will 20.0g of Argon occupy at STP?
Molar mass Argon = 39.948 g/mol1 mol ------ 39.948 g mol ----- 20.0 g mol = 20.0 1 / 39.948= 0.5006 moles1 mol --------------------- 22.4 L ( at STP )0.5006 moles ------------- L L = 0.5006 22.4= 11.21 Lhope this helps!