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CHEM 103 Exam Questions and Answers: Unit Conversions and Significant Figures, Exams of Nursing

University of PikevilleNursing

A series of chemistry questions and answers related to fundamental concepts such as exponential notation, unit conversions, temperature conversions, significant figures, and classification of matter. It covers topics like converting between exponential and ordinary forms, performing unit conversions using given conversion factors, converting between celsius, kelvin, and fahrenheit, calculating mass and density, determining significant figures, and classifying substances as elements, compounds, solutions, or heterogeneous mixtures. Additionally, it includes questions on chemical and physical changes, nuclear symbols, and naming chemical compounds, providing a comprehensive review of basic chemistry principles. This material is useful for students studying introductory chemistry.

Typology: Exams

2024/2025

Available from 05/23/2025

Nurseexcel
Nurseexcel 🇺🇸

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CHEM 103 Module 1 Exam Portage Learning
Questions and Verified Answers,100% Guaranteed Pass
CHEM 103
MODULE:1 2025/2026
Question 1
Click this link to access the
Periodic Table.
This may be helpful throughout the
exam.
1.
Convert 845.3 to exponential form and explain your answer.
2.
Convert 3.21 x 10
-5
to ordinary form and explain your answer.
1.
Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places
= 8.453 x 10
2
2.
Convert 3.21 x 10
-5
=
negative exponent
=
smaller than 1, move decimal 5
places = 0.0000321
Question 2
Click this link to access the
Periodic Table.
This may be helpful throughout the
exam.
Using the following information, do the conversions shown below, showing all
work:
1 ft = 12 inches
1 pound = 16 oz
1 gallon = 4 quarts
1 mile = 5280 feet
1 ton = 2000 pounds
1 quart = 2 pints
kilo (= 1000) 1/100)
milli (= 1/1000)
deci
(= 1/10)
centi (=
1.
24.6 grams = ? kg
2.
6.3 ft = ? inches
pf3
pf4
pf5
pf8
pf9

Partial preview of the text

Download CHEM 103 Exam Questions and Answers: Unit Conversions and Significant Figures and more Exams Nursing in PDF only on Docsity!

CHEM 103 Module 1 Exam Portage Learning

Questions and Verified Answers,100% Guaranteed Pass

CHEM 103

MODULE:1 202 5/

Question 1

Click this link to access the Periodic Table. This may be helpful throughout the exam.

  1. Convert 845.3 to exponential form and explain your answer.
  2. Convert 3.21 x 10 -^5 to ordinary form and explain your answer.
  3. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places = 8.453 x 102
  4. Convert 3.21 x 10 -^5 = negative exponent = smaller than 1, move decimal 5 places = 0.

Question 2

Click this link to access the Periodic Table. This may be helpful throughout the exam. Using the following information, do the conversions shown below, showing all work: 1 ft = 12 inches 1 pound = 16 oz 1 gallon = 4 quarts 1 mile = 5280 feet 1 ton = 2000 pounds 1 quart = 2 pints kilo (= 1000) 1/100) milli (= 1/1000) deci (= 1/10) centi (=

  1. 24.6 grams =? kg
  2. 6.3 ft =? inches
  1. 24.6 grams x 1 kg / 1000 g = 0.0246 kg
  2. 6.3 ft x 12 in / 1 ft = 75.6 inches please always use the correct units in your final answer

Question 3

  1. 3.0600 contains? significant figures.
  2. 0.0151 contains? significant figures.
  1. 3.0600 ÷ 0.0151 =? (give answer to correct number of significant figures)
  2. 3.0600 contains 5 significant figures.
  3. 0.0 151 contains 3 significant figures.
  4. 3.0600 ÷ 0.0151 = 202.649 = 203 (to 3 significant figures for 0.0151)

Question 6

Click this link to access the Periodic Table. This may be helpful throughout the exam. Classify each of the following as an element, compound, solution or heterogeneous mixture and explain your answer.

  1. Coca cola
  2. Calcium
  3. Chili
  4. Coca cola - is not on periodic table (not element) - no element names (not compound) appears to be one substance = Solution
  5. Calcium - is on periodic table = Element
  6. Chili - is not on periodic table (not element) - no element names (not compound) appears as more than one substance (meat, beans, sauce) = Hetero Mix

Question 7

Click this link to access the Periodic Table. This may be helpful throughout the exam. Classify each of the following as a chemical change or a physical change

y 31

Question 8

  1. Baking the batter to a cake
  2. Charcoal burns - burning always = chemical change
  3. Mixing cake batter with water - mixing = physical change
  4. Baking the batter to a cake - baking converts batter to new material = chemical change Click this link to access the Periodic Table. This may be helpful throughout the exam. Show the full Nuclear symbol including any + or - charge (n), the atomic number (y), the mass number (x) and the correct element symbol (Z) for each element for which the protons, neutrons and electrons are shown - symbol should appear as follows: x Z +/-^ n 31 protons, 39 neutrons, 28 electrons 31 protons = Ga 31 , 39 neutrons = 70 Ga 31 , 28 electrons = (+31 - 28 = +3) = 70 Ga +

Question 9

Click this link to access the Periodic Table. This may be helpful throughout the exam. Name each of the following chemical compounds. Be sure to name all acids as acids (NOT for instance as binary compounds)

  1. PF 5
  2. Al 2 (CO 3 ) 3
  3. H 2 CrO 4
  1. PF 5 - binary molecular = phosphorus pentafluoride
  2. Al 2 (CO 3 ) 3 - nonbinary ionic = aluminum carbonate