# Problem: Part A. What is the formula mass of Mg(NO3)2?The formula mass (sometimes called formula weight) of a substance is determined by summing the atomic masses of each atom in its chemical formula. The formula mass of a substance is reported in atomic mass units or amu.

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Part A. What is the formula mass of Mg(NO3)2?

The formula mass (sometimes called formula weight) of a substance is determined by summing the atomic masses of each atom in its chemical formula. The formula mass of a substance is reported in atomic mass units or amu.