Chemistry Post Test Review Units 3-4

Front

What is the correct formula for magnesium nitrate?

Back

Mg(NO₃)₂

Front

What are the products of the reaction between zinc and copper(II) sulfate?

Back

ZnSO₄ and Cu

Front

What is the name for an ion with a negative charge?

Back

Anion

Front

What type of reaction releases more energy than it absorbs?

Back

Exergonic reaction

Front

What happens to energy when bonds break?

Back

Energy is absorbed.

Front

What is the formula for calculating the number of moles in a substance?

Back

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

Front

Define cation.

Back

A cation is an ion with a positive charge.

Front

What is the difference between endothermic and exothermic reactions?

Back

Endothermic reactions absorb energy; exothermic reactions release energy.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.