Question

what is the percentage of oxygen in Ca (OH)2?[Ca= 40/ H=1 /O=16]​

Answer 1

Answer:

The atomic mass of Ca is 40.1 g/mol.

The molar mass of Ca(OH)

2

=74g/mol.

1 mole of Ca(OH)

2

= 74 g Ca(OH)

2

=40.1 g Ca

The percentage composition of calcium in calcium hydroxide =

74

40.1×100

=54%.