Chapter 9
Atomic Foundations of Matter
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

5.3 g of sodium carbonate and 6.0 g of acetic acid react to produce 2.2 g of carbon dioxide, 0.9 g of water, and 8.2 g of sodium acetate. Verify whether the law of conservation of mass is valid.

Answer: Verified

Mass of sodium carbonate = 5.3 g

Mass of acetic acid = 6.0 g

Total mass of reactants = 5.3 g + 6.0 g = 11.3 g

Mass of carbon dioxide = 2.2 g

Mass of water = 0.9 g

Mass of sodium acetate = 8.2 g

Total mass of products = 2.2 g + 0.9 g + 8.2 g = 11.3 g

Since the total mass of reactants is equal to the total mass of products, the law of conservation of mass is valid.

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