Which equation shows conservation of charge? cu + ag+ → cu2+ + ag mg + zn2+ → 2mg2+ + zn 2f2 + br– → 2f– + br2 2i– + cl2 → i2 + 2cl–?

Reaction (4)

Conservation of charge means net charge of the system is same. If in a chemical equation, charge on the reactant side is same as that on the product side, it shows the conservation of charge.

The given reactions are as follows:

In reaction (1), charge on reactant side is +1 and that on product side is +2 thus, it does not show conservation of charge.

In reaction (2), charge on reactant side is +2 and that on product side is +4 thus, it does not show conservation of charge.

In reaction (3), charge on reactant side is -1 and that on product side is -2 thus, it does not show conservation of charge.

In reaction (4), charge on reactant side is -2 and on product side is also -2 thus, it shows conservation of charge.

Therefore, reaction (4) is correct answer.

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).

b. is the answer hoped i