Which of the following are combustion reactions? NaNO3 (aq) arrow Na+(aq) + NO3-(aq)

C2H6 (g) + O2 (g) arrow CO2 (g) + H2O (l)

Mg(s) + HCl (aq) arrow H2 (g) + MgCl2 (aq)

HCl (aq) + NaOH (aq) arrow HOH (l) + NaCl (s)

C₂H₆(g) + O₂(g) ⇒ CO₂(g) + H₂O(l)

Explanation:

Which of the following are combustion reactions?

NaNO₃(aq) ⇒ Na⁺(aq) + NO₃⁻(aq)

NO. This is a dissociation reaction.

C₂H₆(g) + O₂(g) ⇒ CO₂(g) + H₂O(l)

YES. This is a combustion reaction because a compound reacts with oxygen to form carbon dioxide and water.

Mg(s) + HCl (aq) ⇒ H₂(g) + MgCl₂(aq)

NO. This is a single displacement reaction.

HCl(aq) + NaOH (aq) ⇒ HOH(l) + NaCl(s)

NO. This is a neutralization reaction.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i