Question
Chemistry Question on Writing Chemical Formulae
The correct formula for plaster of Paris is
A
CaSO4.4H2O
B
CaSO4.2H2O
C
CaSO4.21H2O
D
CaSO4.1H2O
Answer
CaSO4.21H2O
Explanation
Solution
The correct option is (C): CaSO4.21H2O.
The correct formula for plaster of Paris is
CaSO4.4H2O
CaSO4.2H2O
CaSO4.21H2O
CaSO4.1H2O
CaSO4.21H2O
The correct option is (C): CaSO4.21H2O.