Hello! i need with this question asap ! ; -;

match the following chemical reactions: a, b, c, and d are elements.

a + bc  ac + b combustion
ab + bd  ac + bd synthesis
a + o2 - ao combustion
ab -- a + b single replacement
a + b - ab double replacement
ac + o2 - co2 + h2o decomposition

A + BC → AC + B            Single Replacement

AB + CD → AC + BD       Double Replacement

A + O₂ → AO                   Combustion

AB → A + B                      Decomposition

A + B → AB                       Synthesis  

AC + O₂ → CO₂ + H₂O    Combustion  

Explanation:

So, A + BC → AC + B is an example for single replacement reaction.

Here, A replaces B in the compound BC.

So, AB + CD → AC + BD is an example for double replacement reaction.

Here, A replaces C in the compound CD and B replaces D in the compound CD.

So, A + O₂ → AO and AC + O₂ → CO₂ + H₂O are examples of combustion reactions.

So, AB → A + B is an example for decomposition reactions.

where Ab is decomposed for A and B.

So, A + B → AB is an examples for the synthesis reactions.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.

c. 4.54 x 10–12 j happens to be correct