Calculating the Molar Mass of a Substance

To calculate the molar mass of a substance, you need to add up the atomic masses of all the atoms in its chemical formula. The atomic mass of each element can be found on the periodic table. Then, multiply the atomic mass of each element by the number of atoms of that element in the compound. Add all the results together to find the molar mass.

For example, the molar mass of water (H2O) would be calculated as: (2 * 1.0079) + (1 * 15.999) = 18.015 g/mol.

This process is crucial for stoichiometry and understanding the relationship between mass, moles, and molecules.