Which of the following is a product when a solution of MgCl2(aq) is mixed with a solution of Pb(NO3)2(aq)?

a. PbCl2(aq)
b. PbCl2(s)
c. Pb(NO3)2(s)
d. MgCl2(s)
e. Mg(NO3)2(s)

The product formed in the solution is

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

The chemical equation for the reaction of magnesium chloride and lead nitrate follows:

By Stoichiometry of the reaction:

1 mole of aqueous magnesium chloride reacts with 1 mole of aqueous lead nitrate to produce 1 mole of solid lead chloride and 1 mole of aqueous magnesium nitrate

Hence, the product formed in the solution is

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.