Frequently Asked Question

Questions asked by users might not always be phrased in the clearest way.

How to calculate Mr?

Accepted Answer

Mr is the molar mass of a compound. It is the sum of the atomic masses of all the atoms in the compound. For example, the molar mass of water (H2O) is 18.015 g/mol because it is the sum of the atomic masses of two hydrogen atoms (1.008 g/mol each) and one oxygen atom (16.000 g/mol).


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