Unit 7 Recap Quiz

Multiple Choice

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Multiple Choice

In a chemical equation, is it true that -

• the reactant side and product side can have different numbers of atoms for each element
• there can be different elements on the reactant side and the product side
• an element or compound must be accompanied by a phase change
• the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

Multiple Choice

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Multiple Choice

The law of conservation of mass states that....

• Matter can be made
• Matter can be destroyed
• Matter can neither be made or destroyed
• Matter can evaporate

Multiple Choice

CaCO₃ ----> CaO + CO₂

• Synthesis (or combination)

• Decomposition

• Single replacement

• Double replacement

Multiple Choice

Pb + FeSO₄ ----> PbSO₄ + Fe

• Synthesis (or combination)

• Decomposition

• Single replacement

• Double replacement

Multiple Choice

Complete the following reaction:

HCl + Mg(OH)₂ -->

• MgCl₂ + H₂O

• Mg +H₂O

• MgCl₂ + H₂

• MgCl₂ + H₂O + CO₂

Multiple Choice

The word equation for combustion is:
fuel + oxygen -->
 water + ________ __________

• Carbon dioxide
• Limewater