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 11
A chemical reaction in a sealed container starts with 100 g of reactants. After the reaction, the products and container together still weigh 100 g. What does this demonstrate?
A chemical reaction takes place in an open beaker and the mass of the products is found to be less than the mass of the reactants. What could be a possible explanation?
A reaction vessel contains 50 g of reactants. After the reaction, the products are collected and found to weigh 48 g. What could explain this discrepancy?
A student burns 2 g of magnesium in air and obtains 3.3 g of magnesium oxide. What is the mass of oxygen that reacted?
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 a scenario where the Law of Conservation of Mass appears to be violated and explain why.
Describe an experiment that demonstrates the Law of Conservation of Mass.
Explain how the Law of Conservation of Mass is related to the atomic theory.
Explain why balancing a chemical equation is necessary in light of the Law of Conservation of Mass.
Explain why the Law of Conservation of Mass is important when balancing chemical equations.
If 12 g of carbon reacts completely with 32 g of oxygen to form carbon dioxide, what is the mass of carbon dioxide produced?
If 25 g of reactant X reacts with 15 g of reactant Y to form 35 g of product Z, what is the mass of any other product formed?
In a reaction, 20 g of substance A reacts with 30 g of substance B to form 40 g of substance C and some amount of substance D. What is the mass of substance D formed?
In a reaction, 5 g of hydrogen reacts with 40 g of oxygen to form water. If 2 g of hydrogen remains unreacted, what is the mass of water formed?
State the Law of Conservation of Mass.
