Chemistry Semester Review #1

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What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products. Example: CaCO₃ → CaO + CO₂.

Tags

NGSS.HS-PS1-7

Front

What are the products of the decomposition of water (H₂O)?

Back

The products of the decomposition of water are hydrogen gas (H₂) and oxygen gas (O₂).

Tags

NGSS.HS-PS1-7

Front

What is a single displacement reaction?

Back

A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: Pb + FeSO₄ → PbSO₄ + Fe.

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What is the name of the compound NF₃?

Back

The name of the compound NF₃ is nitrogen trifluoride.

Tags

NGSS.MS-PS1-1

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product. Example: 2 NH₃ + H₂SO₄ → (NH₄)₂SO₄.

Tags

NGSS.MS-PS1-1

Front

What is the general form of a decomposition reaction?

Back

The general form of a decomposition reaction is: AB → A + B, where AB is a compound that breaks down into its elements or simpler compounds.

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What is the difference between a single displacement and a double displacement reaction?

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In a single displacement reaction, one element replaces another in a compound (e.g., A + BC → AC + B). In a double displacement reaction, two compounds exchange ions (e.g., AB + CD → AD + CB).

Front

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.

Tags

NGSS.HS-PS1-7

Front

What is the significance of balancing chemical equations?

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Balancing chemical equations ensures that the number of atoms for each element is the same on both sides of the equation, adhering to the law of conservation of mass.

Tags

NGSS.HS-PS1-7

Front

What is an example of a double displacement reaction?

Back

An example of a double displacement reaction is: Na₂S + BaCl₂ → BaS + 2 NaCl.