In the equation,          2Mg + O₂ = 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

A ________ is the substance at the end of a chemical reaction

• reactant
• product
• surprise
• chemical solution

What is a compound? 

•  the simplest form of a substance 
• a combination only of 3 elements 
• a combination of 2 or more elements 
• a place where people are held 

In a solution which part of the solution is the solute: ice tea mix or water? 

• ice tea mix 
• water
• ice tea

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

What is the simplest form that cannot be broken down to anything simpler? 

• element 
• solution
• compound

Why must chemical equations be balanced?

• So that the equation doesn't explode
• The reaction won't happen until it is balanced
• Matter cannot be created or destroyed
• None of these

Which type of reaction requires oxygen as a reactant and produces CO₂ & H₂O?

• decomposition
• single displacement
• combustion
• double displacement

Which of these is a double displacement reaction?

• 2Mg  +  O₂  -->  2MgO
• Mg  +  2HCl  -->  H₂  +  MgCl₂
• MgI₂  +  K₂CO₃  -->  MgCO₃  +  2Kl
• MgCO₃  -->  MgO  +  CO₂

When a substance in a chemical equation is followed by (aq), it means that the substance is...

• a catalys
• dissolved in water
• a liquid
• a product