Answer:

Explanation:
The electric field of a point charge can be calculated using the next equation:

Where:

The distance can be calculated as:

Using the data provided by the problem:

Trigonal pyramidal has 1 lone pairs and 3 bonds so it is D. PH3
Work: You have to calculate amount of valence electrons for each molecule by looking at the group number and skipping the transition metals. Then you make your Lewis dot structure and see which fits the correct shape. Looking up a molecular geometry chart can help.
The given chemical reaction is:

Δ
∑BE(reactants)-∑BE(products)
= {(941 kJ/mol) + (3 * 242 kJ/mol)} -[{2*(3*200 kJ/mol)}]
= 467 kJ/mol
Calculating the change in heat when 85.3 g chlorine reacts in the above reaction:
Moles of chlorine = 
= 1.20 mol 
Heat change when 1.20 mol chlorine reacts
= 
Hello,
I'd like to introduce you to the magnet analogy:
-Opposite sides attract
-Same sides repel
The first part applies to chemistry, so positive hydrogen bonds tend to attract to negative adjacent molecules.