Which of the following is the correct balanced equation for the reaction of nitric acid with magnesium metal?

Question

A.. HNO₃ (aq) + Mg (s) → MgNO₃ (aq) + H₂ (g)

 B. H₂NO₃ (aq) + Mg (s) → MgNO₃ (aq) + H₂ (g)

 C. HNO₃ (aq) + Mg (s) → MgO (s) + NH₃ (g)

 D. 2 HNO₃ (aq) + 2 Mg (s) → 2 MgNO₃ (aq) + H₂ (g)

E. 2 HNO₃ (aq) + Mg (s) →  Mg(NO₃)₂ (aq) + H₂ (g)

Answer 1

E. 2 HNO₃ (aq) + Mg (s) →  Mg(NO₃)₂ (aq) + H₂ (g)

A metal plus a an acid produces the metal salt plus hydrogen gas, assuming the metal is active enough to replace H from the acid.