1.

What is the chemical formula of plaster of paris?

A. CaSO₄ - 5H₂O
B. 2CaSO₄ - H₂O
C. (CaSO₄) ₂ - 2H₂O
D. CaSO₄ - MgO
Answer» C. (CaSO₄) ₂ - 2H₂O


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