Chemistry Quiz

What does the Law of Conservation of Mass state?

• Mass can be created or destroyed in a chemical reaction.

• Mass is always lost in a chemical reaction.

• Mass is conserved; it is neither created nor destroyed in a chemical reaction.

• Mass is irrelevant in chemical reactions.

What is the difference between ionic bonds and covalent bonds in how they form?

• Ionic bonds form by sharing electrons; covalent bonds form by transferring electrons.

• Ionic bonds form by transferring electrons; covalent bonds form by sharing electrons.

• Both ionic and covalent bonds form by sharing electrons.

• Both ionic and covalent bonds form by transferring electrons.

Ionic bonds occur between what two groups on the periodic table?

• Metals and nonmetals

• Nonmetals and metalloids

• Metals and metalloids

• Noble gases and nonmetals

Covalent bonds occur between what two groups on the periodic table?

• Metals and nonmetals

• Nonmetals and metalloids

• Nonmetals and nonmetals

• Metals and noble gases

What is the balanced equation for the reaction: N₂ + H₂ → NH₃?

• N₂ + 3H₂ → 2NH₃

• N₂ + H₂ → NH₃

• 2N₂ + 3H₂ → 2NH₃

• N₂ + 2H₂ → NH₃

What is the balanced equation for the reaction: Al + O₂ → Al₂O₃?

• 4Al + 3O₂ → 2Al₂O₃

• 2Al + O₂ → Al₂O₃

• Al + O₂ → Al₂O₃

• 3Al + 2O₂ → Al₂O₃

What is the balanced equation for the reaction: CH₄ + O₂ → CO₂ + H₂O?

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ + O₂ → CO₂ + H₂O

• 2CH₄ + 3O₂ → 2CO₂ + 4H₂O

• CH₄ + 3O₂ → 2CO₂ + 2H₂O