Problem 90b

Given information

Given: 

Compound = Posphorous pentachloride

Find:

1. Chemical formula of compound =?

2. Mass percentage of each component =?

Step-by-step explanation

Conceptual plan:

A. Steps to determine the chemical formula of covalent compounds.

1. The first element is listed as the first word of the name.
2. The Second element is named as base word with suffix "ide".
3. Some time prefix is also used with the name of first or second element which represents the number of elements as:

mono		hexa
di		hepta
tri		octa
tetra		nona
penta		deca

*If there is one atom of first element is present then the prefix "mono" is omitted with its name.

B. Steps to determine the mass percent of each element :

1. Determine the molar mass of of compound.
2. Find the mass percent of each element by using the formula.