Question

Determine the volume in liters occupied by 22.6 g of I2 gas at STP.

Answer 1

 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