Chapter 3: Q3.25P (page 132)

Iron reacts slowly with oxygen and water to form a compound commonly called rust. For 45.2 kg of rust, Calculate
The moles of compound
The moles of ${Fe}_{2} O_{3}$
The grams of iron

Short Answer

Expert verified

Moles of rust is $195.01 mol {Fe}_{2} O_{3} . 4 H_{2} O$
Moles of ${Fe}_{2} O_{3} = 195.01 mol {Fe}_{2} O_{3}$
Mass of Fe $= 2.18 \times 10^{4} g$

Step by step solution

Definition of moles

A standard scientific unit for measuring large quantities of very small entities, such as atoms, molecules or other specified particles.

Calculations of moles of compound

The molar mass of rust is 231.78 g/mol

The moles of a compound is:

Moles of rust is:

$= 4.52 \times 10^{4} g {Fe}_{2} O_{3} . 4 H_{2} O (\frac{mol {Fe}_{2} O_{3} . 4 H_{2} O}{231.78 g {Fe}_{2} O_{3} . 4 H_{2} O})$

The moles of rust is $195.01 mol {Fe}_{2} O_{3} . 4 H_{2} O$

Calculations of moles of Fe2O3

Moles of is:

$= 195.01 mol {Fe}_{2} O_{3} . 4 H_{2} O (\frac{mol {Fe}_{2} O_{3} . 4 H_{2} O}{231.78 g {Fe}_{2} O_{3} . 4 H_{2} O})$

Calculations of moles of Fe

Moles of Fe is:

$= 195.01 mol {Fe}_{2} O_{3} . 4 H_{2} O (\frac{2 mol Fe}{1 mol {Fe}_{2} O_{3} . 4 H_{2} O})$

The moles of Fe $= 390.02 mol$

Determination of the mass of iron

Multiply the calculated number of moles of ion by its molar mass which is $55.85 \frac{g}{mol}$

The mass of Fe is:

$= 390.02 mol Fe (\frac{55.85 g Fe}{mol Fe})$

The mass of Fe $= 2.18 \times 10^{4} g$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Chemistry Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Iron reacts slowly with oxygen and water to form a compound commonly called rust. For 45.2 kg of rust, Calculate
The moles of compound
The moles of ${Fe}_{2} O_{3}$
The grams of iron

Short Answer

Step by step solution

Definition of moles

Calculations of moles of compound

Calculations of moles of Fe2O3

Calculations of moles of Fe

Determination of the mass of iron

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Making Measurements

Organic Chemistry

Ionic and Molecular Compounds

Chemistry Branches

Kinetics

Chemical Analysis

Study anywhere. Anytime. Across all devices.

Iron reacts slowly with oxygen and water to form a compound commonly called rust. For 45.2 kg of rust, CalculateThe moles of compoundThe moles ofFe2O3The grams of iron

Short Answer

Step by step solution

Definition of moles

Calculations of moles of compound

Calculations of moles of Fe2O3

Calculations of moles of Fe

Determination of the mass of iron

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Making Measurements

Organic Chemistry

Ionic and Molecular Compounds

Chemistry Branches

Kinetics

Chemical Analysis

Study anywhere. Anytime. Across all devices.

Iron reacts slowly with oxygen and water to form a compound commonly called rust. For 45.2 kg of rust, Calculate
The moles of compound
The moles of ${Fe}_{2} O_{3}$
The grams of iron