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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10

Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)

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Question

Calculate the % of each element in calcium carbonate. (Atomic mass: C-12, O-16, Ca -40)

Sum
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Solution

Calcium carbonate: CaCO3

Molar mass of CaCO3 = 40 + 12 + (16 × 3) = 100 g

% of Calcium = `40/100×100` = 40%

% of Carbon = `12/100×100` = 12%

% of Oxygen = `48/100×100` = 48%.

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Chapter 7: Atoms and Molecules - Evaluation [Page 104]

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Samacheer Kalvi Science [English] Class 10 SSLC TN Board
Chapter 7 Atoms and Molecules
Evaluation | Q IX. 2. | Page 104
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