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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A reaction in a closed container starts with 40 g of reactants and ends with 40 g of products. What does this indicate about the Law of Conservation of Mass?
A reaction starts with 100 g of reactants. After the reaction, the products and container together weigh 100 g. What does this demonstrate?
A reaction vessel contains 50 g of reactants. After the reaction, the products are weighed and found to be 48 g. What could explain this difference?
Describe an experiment that can be used to demonstrate the Law of Conservation of Mass.
A reaction in a closed container starts with 40 g of reactants and ends with 40 g of products. What does this indicate about the Law of Conservation of Mass?
A reaction starts with 100 g of reactants. After the reaction, the products and container together weigh 100 g. What does this demonstrate?
A reaction vessel contains 50 g of reactants. After the reaction, the products are weighed and found to be 48 g. What could explain this difference?
A student mixes 10 g of calcium with 17 g of chlorine. The reaction produces 27 g of calcium chloride. Does this support the Law of Conservation of Mass?
Which of the following best describes the Law of Conservation of Mass? (1) The total mass of reactants equals the total mass of products. (2) The total mass of reactants is always greater than the total mass of products. (3) The total mass of products is always greater than the total mass of reactants. (4) Mass is lost during chemical reactions.
Which of the following best explains why balancing chemical equations is necessary? (1) To satisfy the Law of Conservation of Mass. (2) To make the reaction faster. (3) To increase the yield. (4) To change the products formed.
Which of the following experiments best demonstrates the Law of Conservation of Mass? (1) Heating a beaker of water in an open container. (2) Reacting vinegar and baking soda in a sealed flask. (3) Burning paper in open air. (4) Dissolving salt in water in an open cup.
Which of the following is a direct result of the Law of Conservation of Mass? (1) Atoms are destroyed in a reaction. (2) The number of atoms of each element is the same before and after the reaction. (3) The mass of products is always less than the mass of reactants. (4) Energy is not conserved.
Fill in the blank: In a chemical reaction, the total mass of ______ equals the total mass of ______.
Fill in the blank: The Law of Conservation of Mass is fundamental to writing ______ chemical equations.
Fill in the blank: The Law of Conservation of Mass is valid only in a ______ system.
Fill in the blank: The Law of Conservation of Mass was established in the year ______.
A student mixes 10 g of calcium with 17 g of chlorine. The reaction produces 27 g of calcium chloride. Does this support the Law of Conservation of Mass?
True or False: In a closed system, the mass before and after a chemical reaction remains the same.
True or False: The Law of Conservation of Mass applies only to physical changes, not chemical reactions.
True or False: The Law of Conservation of Mass is a universal law for all chemical reactions in closed systems.
