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In three moles of ethane (C2H6) calculat...

In three moles of ethane `(C_2H_6)` calculate : Number of moles of hydrogen atoms.

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1 mole of `C_2H_6` contains 6 moles of hydrogen atoms
`therefore` 3 moles of `C_2H_6` will contain H-atom = 18 moles
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