Which equation represents a neutralization reaction?
1. Na2CO3 + CaCl2 -> 2NaCl + CaCO3
2. NaCl +AgNO3 -> NaNO3 + AgCl
3. Ni(NO3)2 + H2S -> NiS + 2HNO3
4. H2SO4 + Mg(OH)2 -> MgSO4 + 2H2O

H2SO4(aq) + Mg(OH)2(aq) -> MgSO4(aq) + 2H2O(l)

Explanation:

A neutralization reaction is a chemical reaction in which the acid, (aqeous H2SO4) reacts completely with an appropriate amount of base, (aqueous Mg(OH)2) to produce salt, (aqueous MgSO4) and water, (liquid 2H2O) only.

H2SO4(aq) + Mg(OH)2(aq) -> MgSO4(aq) + 2H2O(l)

Acid + base → Salt + Water.

During this reaction, the hydrogen ion, H+, from the H2SO4 is neutralized by the hydroxide ion, OH-, from the Mg(OH)2 to form the water molecule, H2O.

Thus, the formation of salt, MgSO4(aq) and water, 2H2O(l) makes it a neutralization reaction.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

2b2t

explanation:

2b2t