Law of Conservation of Mass in Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Law of Conservation of Mass in Chemical Reactions starts at 9 and continues till grade 12.
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See sample questions for grade 12
A chemical reaction in a closed container starts with 100 g of reactants. After the reaction, the products and container together weigh 100 g. What does this indicate?
A reaction vessel contains 20 g of sodium and 35.5 g of chlorine. After the reaction, 5 g of sodium remains unreacted. What is the mass of sodium chloride formed?
A student burns 2 g of magnesium in 1 g of oxygen in a closed container. What is the mass of magnesium oxide formed?
A student reacts 10 g of calcium with 17 g of chlorine to form calcium chloride. What is the mass of calcium chloride formed?
Describe an experiment that demonstrates the Law of Conservation of Mass.
Describe how the Law of Conservation of Mass applies to the reaction: 2H2 + O2 → 2H2O.
Describe what would happen to the measured mass if a gas produced in a reaction escapes from an open container.
Explain why chemical equations must be balanced in accordance with the Law of Conservation of Mass.
Explain why the Law of Conservation of Mass is important in industrial chemical processes.
Explain why the Law of Conservation of Mass is not violated when a precipitate forms in a solution.
Explain why the mass of an open system may appear to decrease during a chemical reaction.
If 5 g of hydrogen reacts with 40 g of oxygen to form water, what is the total mass of water produced?
In a reaction, 12 g of carbon reacts with 32 g of oxygen to form carbon dioxide. If 2 g of carbon remains unreacted, what is the mass of carbon dioxide formed?
State the Law of Conservation of Mass.
Which scientist’s experiments with mercury(II) oxide decomposition provided strong evidence for the Law of Conservation of Mass?
Who first formulated the Law of Conservation of Mass?
