Molar mass of chlorine
70.90 g/molCl₂
Molar mass
Molar mass. The mass of one mole in grams: add the atomic mass of every atom in the formula. Masses. Standard atomic masses to two decimals, hydrogen 1.008, every element to uranium. Typing. Ca(OH)2, (NH4)2SO4, CuSO4.5H2O and K4[Fe(CN)6] all work.
70.90g/mol
Cl₂
- Cl× 2100.00%
- Cl2 × 35.4570.90
- Total70.90 g/mol
Grams, moles, particles
Type any one. The other three fill in. Moles. From grams, particles or litres they are rounded to 3 significant figures first, as in a worked answer. 1 mol = 6.022 × 10²³ particles = 22.7 L of gas at STP (1 bar); 22.4 L at 1 atm.
1 mol of Cl₂ = 6.022 × 10²³ molecules
At 1 atm (older value): 22.40 L
Add up the atoms
- Chlorine: 2 × 35.45 = 70.90 g
- Molar mass = 2 × 35.45 = 70.90 g/mol
Share of the mass
- Chlorine100.00%
1 mol of Cl₂ = 70.90 g
1 g of Cl₂ = 0.01410 mol
Chlorine is made of Cl₂ molecules, so 1 mol of it is 70.90 g. A mole of chlorine atoms, Cl, is 35.45 g.
Molar mass of chlorine: quick answers
What is the molar mass of chlorine?
The molar mass of chlorine, Cl₂, is 70.90 g/mol. So 1 mol of chlorine has a mass of 70.90 g.
How do you calculate the molar mass of Cl₂?
Add the atomic masses of all the atoms: 2 × 35.45 = 70.90 g/mol.
How many moles are in 100 g of chlorine?
Divide the mass by the molar mass: 100 ÷ 70.90 = 1.41 mol of Cl₂.