Conservation of Matter Worksheet
Grade 12 Chemistry worksheet focusing on the Law of Conservation of Matter, including balancing equations and practical applications.
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Conservation of Matter: Grade 12 Chemistry
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Read each question carefully and provide thorough answers. Show all your work for calculations. Remember to apply the Law of Conservation of Matter.
1. Which of the following statements best describes the Law of Conservation of Matter?
Matter can be created or destroyed, but not transformed.
Matter can be transformed, but not created or destroyed.
Energy can be converted into matter, and vice versa.
The total mass of reactants is always less than the total mass of products.
2. In a closed system, if 10 grams of substance A react completely with 5 grams of substance B, what is the total mass of the products formed?
5 grams
10 grams
15 grams
Cannot be determined without knowing the products
1. The Law of Conservation of Matter states that matter cannot be created or in a chemical reaction.
2. Balancing chemical equations ensures that the number of atoms for each element is on both sides of the reaction.
3. In an open system, it may appear that matter is lost or gained due to the exchange of with the surroundings.
1. Explain the difference between an open system and a closed system in the context of the Law of Conservation of Matter.
2. Why is balancing chemical equations crucial for demonstrating the Law of Conservation of Matter?
Balance the following chemical equations:
1. H₂ + O₂ → H₂O
2. CH₄ + O₂ → CO₂ + H₂O
3. Al + O₂ → Al₂O₃
1. The total number of moles of reactants must equal the total number of moles of products in a balanced chemical equation.
True
False
2. Nuclear reactions obey the Law of Conservation of Matter in the same way as chemical reactions.
True
False