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1.2.1: Molar Mass - Coggle Diagram
1.2.1: Molar Mass
For example, to calculate the molar mass of aluminium nitrate (a harder problem):
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- The average mass of an atom of an element
- Taking into consideration all of its isotopes and abundancies
- Relative to a carbon-12 atom
For example, to calculate the molar mass of carbon dioxide (an easier problem):
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The molar mass (Mr) of a substance is calculated by adding up the atomic masses of all the atoms present in the formula. The units associated with this term is g/mol.
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When adding or subtracting to calculate the molar mass, you have to round the value to the same number of decimal places as the value with the least number of decimal places. For example, 1.203 + 0.32 = 1.523 but to represent the answer in significant figures, the answer would be 1.5 instead of 1.523 (2sf) since the least number of decimal places in the equation is 2 (for the number 0.32)