Question

for which of the following reactions are both reactants and products likely to be found when the reaction appears to be complete? mg + O2 -----> 2Mgo HF +H2O ----- H30 + F-

Answer 1

The more feasible reaction is:
2Mg + O₂ → 2MgO

This is because the bond between hydrogen and fluorine is very strong so it does not dissociate easily.