Which of the following best explains why you put ki and pb(no3)2 into two separate test tubes before mixing them? to observe both solutions before the reaction to predict the products to make an accurate measurement of the amount of each solution to make it easier to mix the solutions

The answer is A. To observe both solutions before the reaction.

A: to observe both solutions before the reaction

Explanation:

on edge

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.