What type of reactions are the following? ( single displacement, double displacement, synthesis, or decomposition) 4Mn3O4(s) + O2(g) -> 6Mn2O3(s)
Al2O3(aq) + 3C(s) ->3CO(g) + 2Al(l)
Ba(C2H3O2)2(aq) + Na2CO3(aq) -> BaCO3(s) +2NaC2H3O2(aq)
KOH(aq)+HBr(aq) -> KBr(aq)+H2O(l)

1. synthesis

2. single displacement

3.double displacement

4.double displacement

Explanation:

1. here Mangananes (iv) oxide further reacts with oxygen to form Manganese (iii) oxide , two reactants making one product .

2. Carbon replaces aluminium from aluminium oxide to make pure aluminium and carbon monoxide and carbon dioxide.

3. sodium replaces barium to make sodium acetate , barium replaces sodium to make barium carbonate ( precipitate )

4. potassium replaces Hydrogen to produce potassium bromide, while hydrogen and hydroxide ions combine to make water .