Answer:
Percentage of Oxygen in Ca(NO3)2•2H2O
Ankit Mishra
Calculate the Percentage of 1) Oxygen in Calcium nitrate dihydrate.
Calcium nitrate dihydrate, also known as calcium nitrate (II) hydrate, has the chemical formula Ca(NO3)2•2H2O. The percentage of oxygen in calcium nitrate dihydrate can be calculated by determining the number of oxygen atoms in the formula and dividing that by the total number of atoms in the formula, then multiplying by 100 to express the answer as a percentage.
Here's the calculation:
1 calcium atom (Ca) = 40.08 g/mol
2 nitrogen atoms (N) = 14.01 g/mol
10 oxygen atoms (O) = 16.00 g/mol
So, the molar mass of Ca(NO3)2•2H2O is (40.08 + 2 x 14.01 + 10 x 16.00) g/mol = 158.08 g/mol.
The percentage of oxygen in calcium nitrate dihydrate can then be calculated as follows:
(10 x 16.00 g/mol) / 158.08 g/mol x 100% = 63.18%
So, the percentage of oxygen in calcium nitrate dihydrate is approximately 63.18%.