如何计算Molecular Weight

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Molar mass (molecular weight) is the mass of one mole (6.022 × 10²³ molecules) of a substance. It is calculated by summing the atomic masses of all atoms in the chemical formula.

分步指南

1. 1Identify each element and its count in the formula
2. 2Look up each element's atomic mass (from the periodic table)
3. 3Multiply each atomic mass by its count
4. 4Sum all values — the result is in g/mol

例题解析