1.

In three moles of ethane (C_(2)H_(6)), calculate the following : (i) Number of moles of carbon atoms (ii) Number of moles of hydrogen atoms (iii) Number of molecules of ethane

Answer»

SOLUTION :(i) 1 mole of `C_(2)H_(6)` contains 2moles of carbon atoms
`therefore` 3 MOLES of `C_(2)H_(6)` will C - atoms = 6 moles
(ii) 1 mole of `C_(2)H_(6)` contains 6 moles of hydrogen atoms
`therefore " 3 moles of "C_(2)H_(6)" will contain H - atoms = 18 moles"`
(iii) `"1 mole of "C_(2)H_(6)" contains Avogadro.s number. i.e., "6.023xx10^(23)" molecules."`
`therefore" 3 moles of "C_(2)H_(6)" will contain ethane molecules "=3xx6.023xx10^(23)`
`=18.06xx10^(23)" molecules."`


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