Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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This is not graded, it’s for practice. Answer all of the questions.
Transcribed Image Text:**CK-12 Exploration Series**
**Worksheet Section: Check My Understanding**
**Instructions:**
For questions 8-16, circle the choice that best answers each question.
---
**8.** The chemical formula for water is H₂O. What is the chemical formula for methane?
- a. O₂
- b. CO₂
- c. H₂O
- d. CH₄
**9.** The most abundant gas in the air is ______.
- a. xenon
- b. oxygen
- c. water
- d. nitrogen
**10.** The least abundant gas in the air is ______.
- a. Xenon, Xe
- b. Oxygen, O₂
- c. Water, H₂O
- d. Nitrogen, N₂
**11.** O₂ is ______ and N₂ is very ______.
- a. reactive, reactive
- b. reactive, inert
- c. inert, inert
- d. inert, reactive
**12.** Particles in the air move ______.
- a. in an organized fashion
- b. freely
- c. slowly
- d. without hitting one another
**13.** The atoms in the air are called ______ and they are very ______.
- a. noble gases, reactive
- b. molecules, unstable
- c. molecules, common
- d. noble gases, inert
**14.** Air is a ______.
- a. mixture of molecules and atoms
- b. mixture of only molecules
- c. gas made of only atoms
- d. constant composition
**15.** The particles in the air do not interact with one another.
- a. True
- b. False
**16.** Circle the molecule(s) in the atmosphere that come from animals. (circle all that apply)
- a. Carbon dioxide, CO₂
- b. Helium, He
- c. Methane, CH₄
- d. Oxygen, O₂
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This worksheet is designed to test your understanding of the composition and properties of air. Select the best answers to enhance your learning experience.
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