Question

The percentage of Carbon is Ca(HCO3)2 is (a) 15% (b) 1.8% (c) 14.8% (d) 15.2% *​

Answer 1

Answer:

The Correct Answer is Option (c): 14.8%

Explanation:

For Calculating percentage carbon we have to first calculate the molar mass of the compound calcium hydrogen carbonate.

This can be done by calculating individual molar masses of the elements present:

Molar Mass of compounds:

Ca: 40u, H: 1u, C: 12u, O: 16u

Total Molar Mass:

40 + 2 ( 1 + 12 + (16)*3 )

= 40 + 2 ( 13 + 48 )

= 40 + 2 ( 61 )

= 40 + 122

= 162 u

Percentage Carbon present:

$\frac{Amount of Carbon present}{Molar mass of the compound} X 100$

= 24/162 X 100

= 0.148148 X 100

= 14.8 %

Therefore, the percentage of Carbon is Ca(HCO3)2 is 14.8%