Law of conservation of mass — task. Science CBSE Homework Assignments, Class 9.

1. When 5 g of Calcium is burnt in 2 g of Oxygen then 7 g of Calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium reacts with 20 g of oxygen ?

2. The law of conservation of mass was given by

Answer variants:

Proust

5 g

Lavoisier

7 g

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3. Law of conservation of mass

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