1.

Caltulate the numbenatom

Answer»

Molecular weight of H2SO4 = 98 g/mol

15 g of H2SO4 = 15/98 ≈ 0.15 moles

1 mole = 6.023 × 10^23 molecules

0.15 moles =9.023× 10^22 molecules

One molecule of H2SO4 has 4 oxygen atoms,

therefore ;

Number of oxygen atom in 0.15 mole = 4 × 9.023 × 10^22

= 36.1 × 10^22 oxygen atoms


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