Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Chemistry Practice Exam I - Chapters 1-3 - Prof. Zelda Ziegler, Exams of Chemistry

A practice exam for chapters 1-3 of a chemistry course, consisting of multiple choice and short answer questions. Topics covered include atomic structure, formulas and balancing equations, and molar masses. Students are required to identify the correct answer for multiple choice questions and provide reasoning and calculations for short answer questions.

Typology: Exams

Pre 2010

Uploaded on 08/18/2009

koofers-user-5sm
koofers-user-5sm 🇺🇸

10 documents

1 / 4

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
CH 221 Chapters 1-3
Practice EXAM I (chapters 1, 2,3)
Part I. Multiple Choice. Choose the single best response to each question, and
put the letter identifying that response in the blank numbered the same as the
question. If you choose a "none of these" response for a question with a
numerical answer, you must write your answer in the answer blank. Five (5)
points each, fifty (50) points total.
1. A substance with the formula K2PtCl6 is an example of
a(n)
A. element
B. compound
C. mixture
D. solution
E. none of these
1)_____________
2. The symbol A is used to represent the element
A. argon
B. astatine
C. actinium
D. aluminum
E. none of these
2)_____________
3. The mass of a sample is 0.001580 g. The number of
significant figures in this measurement is
A. 1
B. 3
C. 6
D. 7
E. none of these
3)_____________
pf3
pf4

Partial preview of the text

Download Chemistry Practice Exam I - Chapters 1-3 - Prof. Zelda Ziegler and more Exams Chemistry in PDF only on Docsity!

CH 221 Chapters 1- Practice EXAM I (chapters 1, 2,3)

Part I. Multiple Choice. Choose the single best response to each question, and put the letter identifying that response in the blank numbered the same as the question. If you choose a "none of these" response for a question with a numerical answer, you must write your answer in the answer blank. Five (5) points each, fifty (50) points total.

  1. A substance with the formula K 2 PtCl 6 is an example of a(n) A. element B. compound C. mixture D. solution E. none of these

1)_____________

  1. The symbol A is used to represent the element A. argon B. astatine C. actinium D. aluminum E. none of these

2)_____________

  1. The mass of a sample is 0.001580 g. The number of significant figures in this measurement is A. 1 B. 3 C. 6 D. 7 E. none of these

3)_____________

  1. Some units of pressure and their relations are

1 atm = 1.01325 x 10^5 Pa = 760 torr If a gas cylinder has a pressure of 542 atm, it could be recorded as A. 0.713 torr B. 4.12 x 10^5 torr C. 5.49 x 10-7^ Pa D. 5.35 x 10-3^ Pa E. none of these

4)_____________

  1. An ion of potassium, K, has

A. 15 electrons B. 18 electrons C. 19 electrons D. 20 electrons E. none of these

5)_____________

  1. Predict the formula of the ionic compound formed by calcium and oxygen. A. CaO B. CaO 2 C. Ca 2 O D. Ca 2 O 2 E. none of these

6)_____________

  1. Which of the following lists contains only metals? A. Na, Mg, Al, Si B. B, Al, Ga, In C. Zn, Ga, Ge, As D. Zn, Cd, Hg, Dy E. All contain at least one nonmetal

7)_____________

  1. Given a formula, write the name, and vice-versa. (12 points)

iron(III) oxide_____________________ nitrogen trifluoride _____________________ nitric acid _____________________ NaHCO 3 ______________________ SnS_______________________ P 2 O 5 ________________________

  1. If 7.35 g of chromium (Cr) reacted directly with oxygen to form 10.74 g of chromium oxide, what is the simplest formula of the oxide? (12 points)
  2. Consider the reaction

2 H 2 + O 2 → 2 H O 2

Suppose 4.20 g H 2 react with 24.0 g O 2.

a) What is the limiting reagent (reactant)? (8 points)

b) What mass of H 2 O will be produced? (6 points)