What is a chemical reaction?

• A process where substances are converted into new substances

• A process where substances remain unchanged

• A process where only physical changes occur

• A process where substances are destroyed

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Who discovered the law of conservation of mass?

• Isaac Newton

• Albert Einstein

• Antoine Lavoisier

• Marie Curie

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What does the law of conservation of mass state?

• Mass can be created or destroyed

• The total mass of products equals the mass of reactants

• Mass is always greater in products

• Mass is always less in reactants

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What is a reactant in a chemical reaction?

• A new substance produced

• A substance that remains unchanged

• One of the substances that react

• A catalyst that speeds up the reaction

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What is a product in a chemical reaction?

• A substance that initiates the reaction

• A substance that remains unchanged

• One of the new substances produced

• A reactant that is consumed

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What did Lavoisier discover about the mass of reactants and products in a chemical reaction?

• The mass of the reactants is greater than the mass of the products.

• The mass of the reactants is less than the mass of the products.

• The mass of the reactants is equal to the mass of the products.

• The mass of the products is double the mass of the reactants.

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What substance did Lavoisier use in his experiment to study the change of form in substances?

• Water

• Mercury(II) oxide

• Sodium chloride

• Carbon dioxide

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What gas did Lavoisier identify as a part of air during his experiments?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon dioxide

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What is the law that states matter is not created or destroyed in a chemical reaction?

• Law of Gravity

• Law of Conservation of Mass

• Law of Thermodynamics

• Law of Motion

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Why is Lavoisier sometimes called the father of modern chemistry?

• He discovered the electron.

• He invented the microscope.

• He wrote the first instructions for naming compounds.

• He discovered the periodic table.

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