Calculate the no. of molecules in 1.96g of sulphuric acid.
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Molecular mass of H2SO4 = 1*2+32*1+16*4 = 98 g
No of moles of H2SO4 in 196 g = 196/98 = 2 moles
in one mole of H2SO4 and H2O there are equal no of H and H is the liminting factor(reagent) of how much moles of H2O is formed. Number of moles of O does not matter as long as it is half that of H. There are 2 moles of H2 in H2SO4 and so no more than 2 moles of H2O can be formed.
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