Multiple choice

The difference of water molecules in gypsum and Plaster of Paris is:

  1. 5/2

  2. 1/2

  3. 2

  4. 3/2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gypsum is CaSO4 * 2H2O and Plaster of Paris is CaSO4 * 1/2H2O. The difference in water molecules is 2 - 1/2 = 3/2.

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