Calculate the percentage composition of calcium nitrate.

To find the percentage composition of calcium nitrate, we first need to know its chemical formula, which is Ca(NO₃)₂. This compound consists of calcium (Ca), nitrogen (N), and oxygen (O).

Step 1: Determine Molar Mass

Calculate the molar mass of each element in calcium nitrate:

• Calcium (Ca): 40.08 g/mol
• Nitrogen (N): 14.01 g/mol (2 nitrogen atoms)
• Oxygen (O): 16.00 g/mol (6 oxygen atoms)

Now, calculate the total molar mass:

• Calcium: 40.08 g/mol
• Nitrogen: 2 × 14.01 g/mol = 28.02 g/mol
• Oxygen: 6 × 16.00 g/mol = 96.00 g/mol

Total Molar Mass: 40.08 + 28.02 + 96.00 = 164.10 g/mol

Step 2: Calculate Percentage Composition

Now, we can find the percentage of each element in calcium nitrate:

• Percentage of Calcium: (40.08 g/mol / 164.10 g/mol) × 100 = 24.4%
• Percentage of Nitrogen: (28.02 g/mol / 164.10 g/mol) × 100 = 17.1%
• Percentage of Oxygen: (96.00 g/mol / 164.10 g/mol) × 100 = 58.5%

Final Results

The percentage composition of calcium nitrate is:

• Calcium: 24.4%
• Nitrogen: 17.1%
• Oxygen: 58.5%