convert 72g of O2 to moles
moles = mass / molar massmolar mass of O2 is 32therefore moles = 72/32= 2.25 moles
Number of moles = Given mass/molar mass Given mass : 72 gmMolar mass of oxygen gas = 16×2 = 32 gm Therefore, number of moles = 72/32 = 2.25
