Find the number of particle present in 45 gram of sulphuric acid
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Number of particle means number of atoms.
1 mol or a molecule of sulphuric acid consists of 2 atom of hydrogen, 1 atom of sulphur and 4 atom of oxygen. So a total number of 7 atoms are present in 1 molecule of sulphuric acid. But this is in 1 mol of sulphuric acid.
Therefore, number of atoms present in 1 mol of H2SO4 =7
Molar mass of H2SO4 = (2x1)+32+(4x16)= 98g/mol^ -1
So 98 g of h2so4 contains 6.022x10^23 molecules.
Therfore, 45g of h2so4 contains (7÷98)x49= 3.214 atoms.
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