Question

Calculate the number of atoms in plaster of paris ?
a) 15
b) 20
c) 5
d) 2

Answer 1

Answer:

cuso4. 1/2H2o formula for the POP

Answer 2

Answer:

Explanation:

Plaster of Paris is chemically known as calcium sulfate hemihydrate. Overall it is calcium sulphate with a little amount water. If we add up the chemical formula it will give us the number of atoms that combine together to form a single compound of plaster of Paris. ie CaSO4·~0.5H2O.

Chemical formula of Plaster of Paris is CaSO4 .0.5 H2O where in the number of atoms of individual atoms are - one atom of Ca, one atom of S, four atoms of O, and in association water with 1/2 molecule of water, the number of H atoms are one and of O atom is only 1/2,

Thus, when we will sum it up it will come to; Ca - one atom, S - one atom, O - four and a half atoms and H - one atom and the total atoms when  individual atoms are added will becomes 7.1/2 atoms to form the chemical formula of Plaster of Paris molecule.