Balanced Chemical Equations?

How would I write balanced chemical equations for these? :s i'm confused 1. The decomposition reaction of hydrogen sulfide 2. The single displacement reaction of copper(ll) & silver nitrate. 3. The synthesis reaction of sodium & fluorine. 4. The double displacement reaction of aluminum sulfate & calcium... show more How would I write balanced chemical equations for these?
:s i'm confused

1. The decomposition reaction of hydrogen sulfide
2. The single displacement reaction of copper(ll) & silver nitrate.
3. The synthesis reaction of sodium & fluorine.
4. The double displacement reaction of aluminum sulfate & calcium hydroxide.

also i would appreciate it if you explained how you did it.
:)thankyou
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