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

A. 1.99 L

B. 128483.71 L

C. 3.98 * 10^-3

D. 7.78 * 10^-6

(NOT B OR D)

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