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Mole Concept & Avogadro Number

Calculate the...

Question

Calculate the number of molecules in the following.
100 g of calcium carbonate.

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Solution

Molar mass of CaCO₃ = 100 g mol^-1
1 mole of substance contains Avogadro number of molecules.
So, 100 g of CaCO₃ = 6.022×10²³ molecules

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