   # Chromium metal reacts with oxygen to give chromium(III) oxide, Cr 2 O 3. (a) Write a balanced equation for the reaction. (b) What mass (in grams) of Cr 2 O 3 is produced if 0.175 g of chromium metal is converted completely to the oxide? (c) What mass of O 2 (in grams) is required for the reaction? ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 4, Problem 9PS
Textbook Problem
1606 views

## Chromium metal reacts with oxygen to give chromium(III) oxide, Cr2O3. (a) Write a balanced equation for the reaction. (b) What mass (in grams) of Cr2O3 is produced if 0.175 g of chromium metal is converted completely to the oxide? (c) What mass of O2 (in grams) is required for the reaction?

(a)

Interpretation Introduction

Interpretation:

A balanced equation should be written for the reaction of metallic Cr with oxygen forming Cr2O3.

Concept introduction:

• For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
• Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.

### Explanation of Solution

Here chromium metal reacts with oxygen to give chromium (III) oxide,Cr2O3

For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.

Therefore according with law of conservation of mass, the balanced chemical equation for the given reaction is,

(b)

Interpretation Introduction

Interpretation:

The mass of Cr2O3 produced if 0.175g chromium metal is completely converted to the oxide has to be calculated.

Concept Introduction:

• The number of moles of any substance can be determined  using the equation,

Numberofmole=GivenmassofthesubstanceMolarmass

• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
• Massofthesubstance(ingram)=Amountofthesubstance×Molarmassofthesubstance

(c)

Interpretation Introduction

Interpretation:

The mass of O2 required for the reaction has to be determined.

Concept Introduction:

• The number of moles of any substance can be determined  using the equation,

Numberofmole=GivenmassofthesubstanceMolarmass

• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
• Massofthesubstance(ingram)=Amountofthesubstance×Molarmassofthesubstance

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
Which of the following vitamins are classified as fat-soluble? a. vitamins B and D b. vitamins A, D, E, and K c...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Where should the police car in Figure 6-9 have parked to make a good measurement?

Horizons: Exploring the Universe (MindTap Course List)

Even a small loss of body weight can improve OA.

Nutrition Through The Life Cycle

4 What is the function of a ribozyme?

Introduction to General, Organic and Biochemistry

How does glycogen enter the glycolysis pathway?

Chemistry for Today: General, Organic, and Biochemistry

A particle of mass m moves in a circle of radius R at a constant v speed as shown in Figure P11.13. Time t = 0 ...

Physics for Scientists and Engineers, Technology Update (No access codes included)

Why do Peruvian fisheries declineoften dramaticallyin El Nio years?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin 