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Question

Calculate no. of atoms in 4g of H2SO4.

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Solution

Molecular weight of H2SO4 = 98 g/mol
Hence , The number of moles of H2SO4=498=0.04
the compound has 2 molecules of H, 1 molecule of S, and 4 molecules of O. So in total, there are 7 atoms in 1 molecule of H2SO4
Total atoms =7×0.04×6.022×1023
=1.686×1023

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