Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
1
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 to ordinary form and explain your answer.
-5
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) 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
,Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
2
Question 3
,Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
3
Click this link to access the Periodic Table. This may be helpful throughout
the exam.
Do the conversions shown below, showing all work:
1. 28 C = ? K
o o
2. 158 F = ? C
o o
3. 343 K = ? F
o o
1. 28 C + 273 = 301 K
o o o
C → K (make larger)
o
+273
2. 158 F - 32 ÷ 1.8 = 70 C
o o o
F → C (make smaller)
o
-32 ÷1.8
3. 343 K - 273 = 70 C x 1.8 + 32 = 158 F
o o o
K → C→ F
o o o
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 with
density of 1.49 g/ml
2. Show the calculation of the density of crude oil if 26.3 g occupies 30.5
ml.
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.
, Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
4
2. 0.0151 contains ? significant figures.
answers
1
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 to ordinary form and explain your answer.
-5
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) 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
,Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
2
Question 3
,Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
3
Click this link to access the Periodic Table. This may be helpful throughout
the exam.
Do the conversions shown below, showing all work:
1. 28 C = ? K
o o
2. 158 F = ? C
o o
3. 343 K = ? F
o o
1. 28 C + 273 = 301 K
o o o
C → K (make larger)
o
+273
2. 158 F - 32 ÷ 1.8 = 70 C
o o o
F → C (make smaller)
o
-32 ÷1.8
3. 343 K - 273 = 70 C x 1.8 + 32 = 158 F
o o o
K → C→ F
o o o
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 with
density of 1.49 g/ml
2. Show the calculation of the density of crude oil if 26.3 g occupies 30.5
ml.
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.
, Portage Learning / CHEM 103 / Module 1 to 6 Exam
answers
4
2. 0.0151 contains ? significant figures.
