POST-TEST PS 1-2: Matter and its Interactions

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What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a chemical change?

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A chemical change occurs when a substance transforms into a different substance with different properties, often involving a chemical reaction.

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What are intensive properties?

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Intensive properties are characteristics of matter that do not depend on the amount of substance present, such as density and boiling point.

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What are extensive properties?

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Extensive properties are characteristics that do depend on the amount of substance present, such as mass and volume.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with water.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity.

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What does it mean for a substance to be flammable?

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Flammability is a chemical property that indicates a substance's ability to catch fire and burn in the presence of an ignition source.

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How many reactants are in the equation: 2H3PO4 + 3CaCO3 -> Ca3(PO4)2 + 3H2O + 3CO2?

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There are 2 reactants in the equation.

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What is the difference between a reactant and a product?

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A reactant is a substance that undergoes a chemical change in a reaction, while a product is a substance that is formed as a result of that reaction.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.