Register
Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen? A. 12.0 g B. 23.9 g C. 47.8 g D. 95.6 g
231k views
2 votes
Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3

are formed when 16.7 g of Fe reacts completely with oxygen?

A. 12.0 g

B. 23.9 g

C. 47.8 g

D. 95.6 g

User Michael Kolakowski
by
4.1k points

1 Answer

2 votes
The answer is B.

First write a balanced equation, which is
4Fe + 3O2 => 2Fe2O3.

Then divide the grams of Fe by the molar mass of Fe (16.7/55.85).

You now know the number of moles of Fe, so perform dimensional analysis.
(.299*2*159.70)/(4*1) = 23.9 g

User Zorg
by
4.7k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.5m questions

5.8m answers

Other Questions

What is the variable for this number 22.4L?
Which of the following aqueous solutions are good buffer systems? . 0.29 M perchloric acid + 0.15 M potassium perchlorate 0.16 M potassium acetate + 0.26 M acetic acid 0.18 M hydrofluoric acid + 0.12 M
Suppose a flask is filled with of , of and of . The following reaction becomes possible: The equilibrium constant for this reaction is at the temperature of the flask. Calculate the equilibrium molarity
What mass of 2-naphthol would have to be ingested by each rat in a sample set of rats in order to kill half the population of rats? Assume each rat weighs 230 g. Show your calculations for full credit.
A helium balloon containing 0.100 mol of gas occupies a volume of 2.4 L at 25 C and 1.0 atm. how many moles have we added if we inflate it to 5.6 L?
Link Copied!