Question

The percentage of Calcium in CaCO\(_3\) is

• A. 52%
• B. 48%
• C. 20%
• D. 40%

Hint:

To calculate the percentage of an element in a compound, divide the mass of the element by the molar mass of the compound and multiply by 100.

Answer 1

The Correct Option is B

The molar mass of CaCO\(_3\) is 100 g/mol, and the molar mass of calcium is 40 g/mol. Thus, the percentage of calcium in CaCO\(_3\) is: \[ \frac{40}{100} \times 100 = 40% \] Thus, the correct answer is 40%.