Calculation of molar mass
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Posted by Utsav Mishra 5 years, 1 month ago
- 2 answers
Yogita Ingle 5 years, 1 month ago
Step 1. Make use of the chemical formula to determine the number of atoms of each element in the compound.
Step 2. Multiply the atomic weight of each element with its number of atoms present in the compound.
Step 3. Add up all and assign unit as grams/mole.
Example. 1 What is the molar mass of sodium carbonate, Na2CO3 ?
Solution Since sodium carbonate contains two atoms sodium, one atom of carbon and three atoms of oxygen. The molecular weight would be
Na : 2 x 23.0 = 46
C : 1 x 12.0 = 12
O : 3 x 16 = 48
When we add up the total values i.e, 46 + 12 + 48 = 106
Therefore, the molar mass of Na2CO3 is 106 g/mole.
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Sandeep Kumar 5 years, 1 month ago
1Thank You