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CHEM 103 / Module 1 to 6 Exam & Answers : Portage Learning 2024/2025
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CHEM 103 / Module 1 to 6 Exam & Answers : Portage Learning 2024/2025
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1CHEM 103 / Module 1 to 6 Exam & Answers :
Portage Learning
MODULE 1 EXAM
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 102
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 allwork:
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) milli (= 1/1000) centi (=
1/100) deci (= 1/10)
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
, 2
Question 3
, 3
Click this link to access the Periodic Table. This may be helpful throughoutthe exam.
Do the conversions shown below, showing all work:
1. 28oC = ? oK
2. 158oF = ?
oC 3. 343oK = ?
oF
1. 28oC + 273 = 301 oK oC → oK (make larger)
+273
2. 158oF - 32 ÷ 1.8 = 70 oC oF → oC (make smaller)
-32 ÷1.8
3. 343oK - 273 = 70 oC x 1.8 + 32 = 158 oF oK → oC → oF
Question 4
Click this link to access the Periodic Table. This may be helpful throughout the exam.
Be sure to show the correct number of significant figures in each calculation.
1. Show the calculation of the mass of a 18.6 ml sample of freon withdensity of 1.49
g/ml
2. Show the calculation of the density of crude oil if 26.3 g occupies 30.5ml.
1. M = D x V = 1.49 x 18.6 = 27.7 g
2. D = M / V = 26..5 = 0.862 g/ml
Question 5
Click this link to access the Periodic Table. This may be helpful throughout the exam.
1. 3.0600 contains ? significant figures.
, 4
2. 0.0151 contains ? significant figures.
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