Question

2.8g of nitrogen gas was allowed to react with 0.6g of hydrogen gas to produce 3.4g of ammonia . Show that these observations are in agreement with the law of conservation of mass

Answer 1

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The chapter:- ⇔Atoms and Molecules 

⇔Mass of nitrogen gas=2.8g

⇔Mass of hydrogen gas=0.6g

⇔Total mass of reactants=2.8+0.6=3.4g

⇔Given mass of ammonia(product)=3.4g

⇔Since mass of reactants=mass of product, these observations are in agreement with the law of conservation of mass.

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Answer 2

Given that
Mass of nitrogen=2.8g(reactant)
Mass of hydrogen = 0.6g(reactant)
Mass of ammonia=3.4g(product)

Total mass of reactant=2.8+0.6=3.4g
Total mass of product=3.4g

Total mass of reactant=Total mass of product, hence
This reaction is in agreement with the law of conservation of mass