Chemical Reaction Review

What do chemical reactions involve?

• Formation of reactants

• Conversion of products into reactants

• Conversion of reactants into new products

• Destruction of reactants

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NGSS.MS-PS1-5

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According to the law of conservation of energy, what happens to energy?

• It can be created and destroyed

• It can only be converted

• It can be created but not destroyed

• It can be destroyed but not created

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What are the two types of reactions based on energy exchange with the surroundings?

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Reactants and products in a chemical reaction are made up of atoms and must have the same type of (a)  

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NGSS.MS-PS1-5

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According to the law of conservation of mass, what is equal to the total mass of products?

• The total mass of reactants

• The total mass of the surroundings

• The total mass of the universe

• The total mass of the container

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NGSS.MS-PS1-5

When a new substance is formed with different properties than the original substance it is called a

• chemical change

• physical change

• state change

• phase change

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NGSS.MS-PS1-5

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Chemical change occurs as a result of a ____________.

• chemical reaction

• physical change

• phase change

• controlled experiment

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NGSS.MS-PS1-5

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What describes the reactant atoms in the equation shown?

• Al= 4, O= 3
• Al= 1, O= 1
• Al= 4, O= 6
• Al= 6, O= 1

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NGSS.MS-PS1-1

This equation is _________.

• balanced
• not balanced

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NGSS.MS-PS1-5

This equation is _________.

• balanced
• not balanced

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NGSS.MS-PS1-5

NGSS.MS-PS1-2