The formulae of compounds W, X and Y are shown.
W $CuS{O_4}.5{H_2}O$
X $MgS{O_4}.7{H_2}O$
Y $Cu{\left( {N{O_3}} \right)_2}.6{H_2}O$
Which statement is correct?
1 )
W contains twice as many hydrogen atoms as oxygen atoms.
2 )
X contains the most oxygen atoms.
3 )
Y contains the most hydrogen atoms.
Y contains the same number of hydrogen and oxygen atoms.
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