Iron (III) Chloride Hexahydrate Is Used as a Coagulant for Sewage

question 21

Multiple Choice

Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

• A) Fe(Cl  6H₂O)₃
• B) Fe₃Cl  6H₂O
• C) FeCl₃(H₂O)₆
• D) Fe₃Cl(H₂O)₆
• E) FeCl₃  6H₂O

---

Definitions:

Future Income

Expected earnings or revenue that an individual or business anticipates receiving in the future.

Interest Rate

The percentage charged on the total amount of borrowed money or paid on saved or invested capital.

Interest Rate

The part of a loan that is taken as interest from the borrower, customarily presented as an annual percentage of the still unpaid loan.

Present Value

The current worth of a future sum of money or stream of cash flows, given a specific rate of return.