Chemical Reactions Review

Is this balanced?...
Fe + S --> FeS

• YES!
• NO!

Is this balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• NO!

Name this reaction, Cl₂ + 2KI _-->  I₂ + 2KCl

• Synthesis
• Single Replacement
• Double Replacement
• Decomposition

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

 Mg  +  ___ HCl  →   MgCl₂  +   H₂

• 1
• 2
• 3
• 4

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

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

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