Water is made up of 2 hydrogens and 1 oxygen.Ģ. The molar mass is calculated by taking the sum of the atomic weights of all the atoms which form the molecule.įirst determine the number of each atom in the formula.ġ. The molar mass of a substance is the mass in grams of 1 mole of the substance. When there is parenthesis's around a group of atoms we must multiply each atom by the subscript to get the total number of each element.Ĭa(NO 3) 2 1 Calcium 2 Nitrogen and 6 Oxygen -> 3 x 2

Reading Compounds that have (parenthesis's). If there is only 1 atom we do not use subscripts. The subscript belongs to the element it follows and indicates how many of that atom there are. Reading Simple Chemical Formulas- Each element begins with a CAPITAL letter. The units are atomic mass units ( amu ).ġamu =1.660 538 782×10 –27 kg 1 amu is 1/12 the mass of a carbon-12 atom which has a mass of 12.0000. Molecules are composed of several atoms, for example a carbon dioxide molecule (CO2) is made up of 1 carbon atom and 2 oxygen atoms. Molecular Mass is the mass of a given molecule (NOT MOLES of molecules).

Molecular Weight is the molar mass of a COVALENT compound. The unit for molar mass (note it is the mass of a mole) is grams/mole.Ītomic Weight is the molar mass of an element.įormula Weight is the molar mass of an IONIC compound. Molar Mass is the mass of one mole of a substance (6.02 x 10 23 formula units). find the atomic mass in g/mol of each element (the molar mass of an element is equal to its atomic mass): Molar Mass (g/mol) C (Carbon) 12. Find the Molar Mass of 6 CO 2 Step-by-Step. (Molar Mass, Molecular Weight, Gram Formula Mass) The molar mass and molecular weight of 6CO2 is 264.057.

Co element molar mass