Question

What will be the differencing number of molecules of water in 4 moles of gypsum and 3 moles of plaster of paris ??

Answer 1

The molecular formula of gypsum is CaSO4. 2H2O
In 4moles of gypsum, the number of moles of water is 8moles
The molecular formula of plaster of paris is CaSO4 1/2H2O
In 3moles of plaster of paris , the number of moles of water is 3/2
moles.
The difference of water molecules is 13/2 moles

Answer 2

The answer is 13/2 molecules of water= 6.5 molecules