What is the percentage composition of carbon in \( \mathrm{Ca(HCO_3)_2} \) ? [ Ca = 40.0, 0= 16.0, C = 12.0, H= 1.0]

Assessment: WAEC SSCE - Chemistry - 2022 (Objective) Subject: Chemistry

Question 1 Report

What is the percentage composition of carbon
in \( \mathrm{Ca(HCO_3)_2} \) ?

[ Ca = 40.0, 0= 16.0, C = 12.0, H= 1.0]

22.2%

14.8%

7.4%

3.7%

Answer Details

. % of C in Ca(HCO3)2
Molar mass of Ca(HCO3)2 = 40+(1+12+(16*3))2
=40+(13+48)2
=40+122
=162
C/Ca(HCO3)2 x 100
=12 * 2/162 * 100
=14.8%

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