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Answers
Law of Conservation of Mass states that, "Mass can neither be created nor be destroyed in a chemical reaction."
In other words, total mass of reactants
= total mass of products
3) Given reaction :
Hydrocarbon + Oxygen --> Water + Carbon Dioxide
Mass of Hydrocarbon = 0.22 g
Mass of Oxygen = 1.12 g
Therefore, total mass of reactants
= 0.22 + 1.12
= 1.34 g
Mass of Water = 0.9 g
Mass of Carbon Dioxide = 0.44
Therefore, total mass of products
= 0.9 + 0.44
= 1.34 g
Therefore, total mass of ractants = total mass of products = 1.34 g
Therefore, the given reaction is in accordance with the law of conservation of mass.
4) Given reaction :
Ethane + Oxygen --> Carbon Dioxide + Water
Mass of Ethane = 3.0 g
Mass of Oxygen = 11.2
Therefore, total mass of reactants
= 3.0 + 11.2
= 14.2 g
Mass of Carbon Dioxide = 8.8 g
Mass of Water = 5.4 g
Therefore, total mass of products
= 8.8 + 5.4
= 14.2
Therefore, total mass of ractants = total mass of products = 14.2 g
Therefore, the given reaction is in accordance with the law of conservation of mass.