Identify the type of reaction and then balance the equation for each of the following reactions.
( fill in the blank )
1. al2o3  al + o2
2. mg + hno3 -> mg(no3)2 + h2
3. c6h6 + o2 -> co2 + h2o
4. ag + s -> ag2s
5. ca(oh)2 + h3po4 -> ca3(po4)2 +

The answer to your question is below

Explanation:

There are 4 types of chemical reactions:

- Synthesis is when two elements or compounds form only one compound.

- Decomposition is when 1 compound is broken into 2 or more products.

- Single replacement is when one element is replaced by another element.

- Double replacement is when the cations of two compounds are interchanged.

1.- Decomposition                      2 Al₂O₃    ⇒    4 Al   +  3O₂

2.- Single replacement          Mg  +  2HNO₃   ⇒   Mg(NO₃)₂   +  H₂

3.- Combustion                      2C₆H₆  +  15O₂   ⇒   12CO₂   +   6H₂O

4.- Synthesis                          2Ag   +   S   ⇒   Ag₂S

5.- Double replacement      3Ca(OH)₂   + 2H₃PO₄   ⇒   Ca₃(PO₄)₂  + 6 H₂O

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- lead + phosphoric acid = hydrogen + lead(ii) phosphate