The volume in liters occupied by 22.6 g of I₂ gas at STP is 1.99 L (answer A)
calculation
Step: find the moles of I₂
moles= mass÷ molar mass
from periodic table the molar mass of I₂ is 253.8 g/mol
moles = 22.6 g÷253.8 g/mol =0.089 moles
Step 2:find the volume of I₂ at STP
At STP 1 moles =22.4 L
0.089 moles= ? L
by cross multiplication
={ (0.089 moles x 22.4 L) /1 mole} = 1.99 L
