Indetifying the reaction?

Question

Can you please help me identify the reaction for these chemical formulas, such as single replacement, double replacement, sythesis, decompisiton and more

1) Aluminum+ Iron (III) Chroide--->
2) Calcium Hydroxide---->
3)Water(use H2O) + Sulfur Trioxide--->
4) Sodium Choride + Magnesium Sulfate--->
5) Nitric Acid + Sodium Hydroxide--->
6) Butane (C4H10) + Oxygen--->
7) Copper (II) Carbonate--->
8) Silver + Oxygen--->

Answer 1

1) Single Replacement (SR)
2) Decomposition (DEC)
3) Double Replacement (DR)
4) DR
5) DR
6) SR
7) DEC
8) Synthesis (SYN)

Answer 2

To figure out the type of reaction all you have to do is look at the reactants (the stuff to the left of the arrow).

If the reactants are a HYDROCARBON + OXYGEN = combustion (a hydrocarbon is a compound of carbon and hydrogen)
If the reactants are TWO ELEMENTS = synthesis
If the reactant is only ONE COMPOUND = decomposition
If the reactants are ONE ELEMENT + 1 COMPOUND = single replacement
If the reactants are TWO COMPOUNDS = double replacement

#3 is tricky - it looks like it should be double replacement (two compounds) but it is actually synthesis; it forms an acid

You can take it from here, right?