Question

2. You have 15 grams of Chlorine gas. Calculate how many moles of Chlorine you have (hint: look up the chemical formula for Chlorine)

Answer 1

Molar mass of Cl2 = 70.9 g/mol


mass(Cl2)= 15 g

use:
number of mol of Cl2,
n = mass of Cl2/molar mass of Cl2
=(15 g)/(70.9 g/mol)
= 0.2116 mol
Answer: 0.21 mol