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Calculate the Formula Masses of the Following Compounds : Calcium Carbonate - Science

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Short Note

Calculate the formula masses of the following compounds :

Calcium carbonate

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Solution

Atomic mass of aluminium = 27 u

Atomic mass of oxygen = 16 u

Formula mass of Al2O3 can be calculated as follows:

Formula mass of Al2O3 = Mass of two Al atoms + Mass of three O atoms

= 2 × 27 + 3 × 16   

= 54 + 48

= 102

Therefore, the formula mass of Al2O3 is 102 u.

Concept: Molecular Mass
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APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Short Answers | Q 21.2 | Page 151

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