Chemistry Semester Review #1

Front

What is a synthesis reaction?

Back

A synthesis reaction, also known as a combination reaction, is a type of chemical reaction where two or more reactants combine to form a single product.

Front

What is a mole in chemistry?

Back

A mole is the SI unit for the amount of a substance, defined as containing exactly 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the name of the compound NaH?

Back

The name of the compound NaH is sodium hydride.

Front

What unit is molar mass measured in?

Back

Molar mass is measured in grams per mole (g/mol).

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products.

Front

What is a double displacement reaction?

Back

A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the formula for calculating molarity?

Back

Molarity (M) = moles of solute / liters of solution.