Some copper (II) sulphate pentahydrate \(\left(\mathrm{USO}_{4} \mathrm{SH}_{2} \mathrm{O} \right)\), was heated at \(120^{\circ} \mathrm{C}\) with the following results: wt of crucible \(=10.00 \mathrm{~g}\); wt of crucible + \(\mathrm{CUSO}_{4} \mathrm{SH}_{2} \mathrm{O}=14.98 \mathrm{~g}\) wt of crucible \(+\) residue \(=13.54 \mathrm{~g}\). how many molecules of water of crystallization were lost?

\((\mathrm{H}=1, \mathrm{Cu}=63.5, \mathrm{O}=16.332)\)

A. 1
B. 2
C. 3  
D. 4
E. 5

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Correct Answer: C