World of Chemistry - 4th Edition - Approachable Chemistry Learning Support

Sep 22, 2026

Uploaded by Margaret

World of Chemistry (4th Edition) presents chemistry learning with an accessible writing and narrative style supported by National Geographic Explorers visuals. It emphasizes detailed problem-solving, engineering design, real-world applications, and active learning through embedded investigations, hands-on minilabs, and an NGSS Activity Guide. The program aligns with Next Generation Science Standards and provides teacher support via the Teacher’s Edition and downloadable lab resources. Core content includes molar mass, unit-aware calculations, and example-driven practice problems for percent composition and mole-to-mass conversions.

LanguageEnglish

CategoryExam

FormatPDF

Pages4

Reading Time10 min

AccessFree to download

Authentic Student Engagement

Active Learning and Hands-on Chemistry

Engineering Practices and Design

Teacher Support

Molar Mass and Percent Composition

Core Ideas and Skills

Worked Examples and Checkpoints

World of Chemistry 4th Edition, ©2021 World of Chemistry Zumdahl / Zumdahl / DeCoste World of Chemistry is designed to be accessible to all students with: • Approachable writing and narrative style • National Geographic Explorers and images • Detailed problem-solving support • Engineering design • Real-world applications National Geographic Explorers and visuals capture student attention and tell the story of how chemistry is critical to daily life. World of Chemistry includes the OWLv2 online learning platform and aligns to the Next Generation Science Standards (NGSS) . Authentic Student Engagement Engage students with National Geographic images and stories of National Geographic Explorers who use chemistry to solve real-world problems.“Case Studies” and“Chemistry in Your World” features highlight real-world applications of chemistry. National Geographic images and photography “Explorers At Work” feature the work of National Geographic Explorers Active Learning and Hands-on Chemistry • Investigations are included at the end of every chapter • “Hands-on Chemistry Minilabs” are embedded throughout each chapter • A downloadable Lab Manual is available with additional labs aligned to the program • An“NGSS Activity Guide”includes hands-on, 3-Dimensional lessons • The Teacher’s Edition includes many additional classroom activities and demonstrations. Engineering Practices and Design The work of Engineers“Exploring Engineering”beginning of some Engineering” features The Engineering is highlighted in articles at the chapters and in“Chemical throughout the program. Practices from the NGSS are detailed in Chapter 1 and are applied by students in hands-on labsand Investigations. Teacher Support | | Molar Mass and Percent Composition
Core Ideas and Skills
• Explain the concept of molar mass
• Convert between moles and mass
• Calculate the mass percent of an element in a compound
Molar Mass
A chemical compound is, fundamentally, a collection of atoms. For example, methane (the major component of natural gas) consists of molecules each containing one carbon atom and four hydrogen atoms (CH4):
1 CH4 molecule

1 C atom 4 H atoms
So if we have 10 molecules of methane we have 10 carbon atoms and 40 hydrogen atoms:

How can we calculate the mass of 1 mole of methane? That is, what is the mass of 6.022 3 1023 CH4 molecules? Because each CH4 molecule consists of one carbon atom and four hydrogen atoms, 1 mole of CH4 molecules consists of 1 mole of carbon atoms and 4 moles of hydrogen atoms.

The mass of 1 mole of methane can be found by summing the masses of carbon and hydrogen present. | | --- | --- | | 200 CHAPTER 6 CHEMICAL COMPOSITION | | | Mass of 1 mol C 5 1 3 12.01 g 5 12.01 g Mass of 4 mol H 5 4 3 1.008 g 5 4.032 g Mass of 1 mol CH4 5 16.04 g
The quantity 16.04 g is called the molar mass of methane: the mass of 1 mole of CH4 molecules. The molar mass of any substance is the mass in grams of 1 mole of the substance. The molar mass is obtained by summing the masses of the component atoms.
checkpoint Explain how to calculate the molar mass of a compound, and give an example.
Example 6.5
Calculating Molar Mass
Calculate Determine the molar mass of sulfur dioxide, a gas produced when sulfurcontaining fuels are burned. Unless “scrubbed” from the exhaust, sulfur dioxide can react with moisture in the atmosphere to produce acid rain.
Solution
Where Do We Want To Go?
• Molar mass (SO2) S ? g/mol What Do We Know?
• The formula for sulfur dioxide is SO2.
• Atomic masses S 5 32.07 g/mol
O 5 16.00 g/mol
How Do We Get There?
We need to find the mass of 1 mole of SO2 molecules—the molar mass of SO2. | | | | | --- | --- | --- | --- | |
1 mol SO2 molecules | | | | | Mass of 1 mol S 5 1 3 32.07 5 32.07 g
Mass of 2 mol O 5 2 3 16.00 5 32.00 g
Mass of 1 mol SO2 5 64.07 g 5 molar mass 5 64.07 g/mol The molar ma

FAQs

What learning features make World of Chemistry designed to be accessible to students?

It uses approachable writing and narrative style, National Geographic Explorers images, detailed problem-solving support, engineering design connections, and real-world applications.

How is molar mass defined and calculated?

Molar mass is the mass in grams of 1 mole of a substance. It is obtained by summing the masses of the component atoms in the chemical formula.

What does the book emphasize for hands-on learning and active engagement?

It includes investigations at the end of every chapter, embedded “Hands-on Chemistry Minilabs,” downloadable lab manual materials, and an NGSS Activity Guide with 3-dimensional lessons.

Sep 22, 2026

Uploaded by Margaret

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