How to find formula unit mass
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Formula unit mass is the sum of the atomic masses of all atoms present in a formula unit of a compound. It is calculated by adding the atomic masses of all the atoms present in one formula unit. Formula unit mass of. (NH4)2so4 = 14x2 + 4x2 + 32 + 16x4 = 132 u.
1 mol of an atom, molecule or formula unit contains 6.02 x 1023 atoms, molecules or formula units.
1. 1 mol has a mass in grams equal to the atomic, formula or molar mass of a substance.
2. 1 mol He = 4.0 g He.
3. 2 H = 2 x 1.0 g = 2.0 g.
4. 1 S = 32.0 g = 32.0 g.
5. 4 O = 4 x 16.0 g = 64.0 g
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