Number of Molecules in 42.0g of Cl2: A Step-by-Step Calculation
The molar mass of Cl2 is 70.9 g/mol. This means that 42.0 g of Cl2 is equal to 42.0 g / 70.9 g/mol = 0.593 mol.
One mole of any substance contains 6.022 x 10^23 molecules. Therefore, 0.593 mol of Cl2 contains 0.593 mol x 6.022 x 10^23 molecules/mol = 3.57 x 10^23 molecules.
Therefore, there are 3.57 x 10^23 molecules in 42.0 g of Cl2.
