Calculate the no. of atoms of each element persent in 9.8 g of sulphuric acid, H2SO4. (H=1, S=32, O=16)

Molecular weight of H2SO4 = 98

  9.8 gm of H2SO4 = 9.8/98 = 0.1mole

  1 mole = 6.023 x 1023 molecules

0.1  Mole = 6.023 x 1022 molecules.

One molecule of H2SO4 = 2 hydrogen atom, one sulphur atom and 4 oxygen atoms therefore

Number of hydrogen atom in 0.1 mole = 2 x 6.023 x 1022

  = 12.046 x 1022

Number of sulphur atom in 0.1 mole = 1 x 6.023 x 1022

  = 6.023 x 1022

Number of oxygen atom in 0.1 mole = 4 x 6.023 x 1022

  = 24.092 x 1022

  • 55
What are you looking for?