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CaSO(4).(1//2)H2O+'X'toCaSO(4).2H2O Gues...

`CaSO_(4).(1//2)H_2O+'X'toCaSO_(4).2H_2O` Guess the substance `X`.

A

`a`. `2H_2O`

B

`b`. `1^(1/2)H_2O`

C

`c`. `H_2O`

D

`d`. `SO_2`

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