Which of the following combinations of reactants will result in a synthesis reaction? f2 + hcl al + o2 ca + h2o li + hcl

Al + O2

Explanation:

A general classification of reactions uses four general types of reactions.

These are:
1) combination or synthesis
2) substitution or single replacement
3) double replacement
4) decomposition.

Of those the scheme of synthesis type is:

A + B → AB

That is the schem with the given reaction Al + O2:

Al + O2 → Al2O3

Then that is the answer.

F2 + HCl, Ca + H2O, and Li + HCl are under the scheme of single replacement: A + BC → BA + C

D-no effect on the rate