Which balanced equation represents a redox reaction? a. agno3(aq) +nacl(aq) →agcl(s) +nano3(aq) b. h2co3(aq) →h2o() + co2(g) c. naoh(aq) + hcl(aq) →nacl(aq) + h2o() d. mg(s) + 2hcl(aq) →mgcl2(aq) + h2(g)

can you also explain why for every answer

Answer : The correct option is, (D)

Explanation :

(A)

This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.

(B)

This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.

(C)

This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.

(D)

This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.

Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.

In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).

Hence, the correct option is, (D)

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

la respuesta es si te gusta hacer lo que siempre haces cuando nunca ves a alguien en el espejo porque sabes que no siempre están ahí.