CHEM 103
Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT
OF 100) Portage learning (Latest Update)
Gradegurus
➢
➢
➢
➢
,Pay it forward.
t t
MODULE 1 EXAM t t
Question 1 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
1. Convert 845.3 to exponential form and explain your answer.
t t t t t t t t
2. Convert 3.21 x 10-5 to ordinary form and explain your answer.
t t t
t
t t t t t t
1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places
t t t t t t t t t t t t
= 8.453 x 102
t t t
2. Convert 3.21 x 10-5 = negative exponent = smaller than 1, move decimal 5
t t t
t
t t t t t t t t t
t places = 0.0000321 t t
Question 2 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Using the following information, do the conversions shown below, showing all
t t t t t t t t t t
work:
t
1 ft = 12 inches
t t t t 1 pound = 16 oz
t t t t 1 gallon = 4 quarts
t t t t
1 mile = 5280 feet
t t t t 1 ton = 2000 pounds
t t t t 1 quart = 2 pints
t t t t
kilo (= 1000) t t milli (= 1/1000) t t centi (= t
1/100)
t t deci (= 1/10) t t
1. 24.6 grams = ? kg t t t t
2. 6.3 ft = ? inches t t t t
1. 24.6 grams x 1 kg / 1000 g = 0.0246 kgt t t t t t t t t t
2. 6.3 ft x 12 in / 1 ft = 75.6 inches
t t t t t t t t t t
please always use the correct units in your final answer
t t t t t t t t t
Question 3 t
,Click this link to access the Periodic Table. This may be helpful throughout
t t t t t t t t t t t t
the exam.
t t
Do the conversions shown below, showing all work:
t t t t t t t
1. 28oC = ? oK t t t
2. 158oF = ? oC t t t
3. 343oK = ? oF t t t
1. 28oC + 273 = 301 oK t t t t t
o
C → oK (make larger)
t t t t
+273
2. 158oF - 32 ÷ 1.8 = 70 oC t t t t t t t
o
F → oC (make smaller)
t t t t
-32 ÷1.8 t
3. 343oK - 273 = 70 oC x 1.8 + 32 = 158 oF
t t t t t t t t t t t t
o
K → oC → oF
t t t t
Question 4 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Be sure to show the correct number of significant figures in each calculation.
t t t t t t t t t t t t
1. Show the calculation of the mass of a 18.6 ml sample of freon with
t t t t t t t t t t t t t
density of 1.49 g/ml
t t t t
2. Show the calculation of the density of crude oil if 26.3 g occupies 30.5
t t t t t t t t t t t t t
ml.
t
1. M = D x V = 1.49 x 18.6 = 27.7 g
t t t t t t t t t t t
2. D = M / V = 26..5 = 0.862 g/ml
t t t t t t t t t t t
Question 5 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
1. 3.0600 contains ? significant figures. t t t t
2. 0.0151 contains ? significant figures. t t t t
, 3. 3.0600 ÷ 0.0151 = ? (give answer to correct number of significant
t t t t t t t t t t t
figures)
t
1. 3.0600 contains 5 significant figures. t t t t
2. 0.0151 contains 3 significant figures. t t t t
3. 3.0600 ÷ 0.0151 = 202.649 = 203 (to 3 significant figures for 0.0151)
t t t t t t t t t t t t
Question 6 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Classify each of the following as an element, compound, solution or
t t t t t t t t t t
heterogeneous mixture and explain your answer.
t t t t t t
1. Coca cola t
2. Calcium
3. Chili
1. Coca cola - is not on periodic table (not element) - no element names
t t t t t t t t t t t t t
(not compound)
t t
appears to be one substance = Solution
t t t t t t
2. Calcium - is on periodic table = Element t t t t t t t
3. Chili - is not on periodic table (not element) - no element names (not
t t t t t t t t t t t t t
compound)
t
appears as more than one substance (meat, beans,
t t t t t t t
sauce) = Hetero Mix
t t t
Question 7 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Classify each of the following as a chemical change or a physical change
t t t t t t t t t t t t
1. Charcoal burns t
2. Mixing cake batter with water t t t t
Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT
OF 100) Portage learning (Latest Update)
Gradegurus
➢
➢
➢
➢
,Pay it forward.
t t
MODULE 1 EXAM t t
Question 1 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
1. Convert 845.3 to exponential form and explain your answer.
t t t t t t t t
2. Convert 3.21 x 10-5 to ordinary form and explain your answer.
t t t
t
t t t t t t
1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places
t t t t t t t t t t t t
= 8.453 x 102
t t t
2. Convert 3.21 x 10-5 = negative exponent = smaller than 1, move decimal 5
t t t
t
t t t t t t t t t
t places = 0.0000321 t t
Question 2 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Using the following information, do the conversions shown below, showing all
t t t t t t t t t t
work:
t
1 ft = 12 inches
t t t t 1 pound = 16 oz
t t t t 1 gallon = 4 quarts
t t t t
1 mile = 5280 feet
t t t t 1 ton = 2000 pounds
t t t t 1 quart = 2 pints
t t t t
kilo (= 1000) t t milli (= 1/1000) t t centi (= t
1/100)
t t deci (= 1/10) t t
1. 24.6 grams = ? kg t t t t
2. 6.3 ft = ? inches t t t t
1. 24.6 grams x 1 kg / 1000 g = 0.0246 kgt t t t t t t t t t
2. 6.3 ft x 12 in / 1 ft = 75.6 inches
t t t t t t t t t t
please always use the correct units in your final answer
t t t t t t t t t
Question 3 t
,Click this link to access the Periodic Table. This may be helpful throughout
t t t t t t t t t t t t
the exam.
t t
Do the conversions shown below, showing all work:
t t t t t t t
1. 28oC = ? oK t t t
2. 158oF = ? oC t t t
3. 343oK = ? oF t t t
1. 28oC + 273 = 301 oK t t t t t
o
C → oK (make larger)
t t t t
+273
2. 158oF - 32 ÷ 1.8 = 70 oC t t t t t t t
o
F → oC (make smaller)
t t t t
-32 ÷1.8 t
3. 343oK - 273 = 70 oC x 1.8 + 32 = 158 oF
t t t t t t t t t t t t
o
K → oC → oF
t t t t
Question 4 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Be sure to show the correct number of significant figures in each calculation.
t t t t t t t t t t t t
1. Show the calculation of the mass of a 18.6 ml sample of freon with
t t t t t t t t t t t t t
density of 1.49 g/ml
t t t t
2. Show the calculation of the density of crude oil if 26.3 g occupies 30.5
t t t t t t t t t t t t t
ml.
t
1. M = D x V = 1.49 x 18.6 = 27.7 g
t t t t t t t t t t t
2. D = M / V = 26..5 = 0.862 g/ml
t t t t t t t t t t t
Question 5 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
1. 3.0600 contains ? significant figures. t t t t
2. 0.0151 contains ? significant figures. t t t t
, 3. 3.0600 ÷ 0.0151 = ? (give answer to correct number of significant
t t t t t t t t t t t
figures)
t
1. 3.0600 contains 5 significant figures. t t t t
2. 0.0151 contains 3 significant figures. t t t t
3. 3.0600 ÷ 0.0151 = 202.649 = 203 (to 3 significant figures for 0.0151)
t t t t t t t t t t t t
Question 6 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Classify each of the following as an element, compound, solution or
t t t t t t t t t t
heterogeneous mixture and explain your answer.
t t t t t t
1. Coca cola t
2. Calcium
3. Chili
1. Coca cola - is not on periodic table (not element) - no element names
t t t t t t t t t t t t t
(not compound)
t t
appears to be one substance = Solution
t t t t t t
2. Calcium - is on periodic table = Element t t t t t t t
3. Chili - is not on periodic table (not element) - no element names (not
t t t t t t t t t t t t t
compound)
t
appears as more than one substance (meat, beans,
t t t t t t t
sauce) = Hetero Mix
t t t
Question 7 t
Click this link to access the Periodic Table. This may be helpful throughout the
t t t t t t t t t t t t t t
exam.
t
Classify each of the following as a chemical change or a physical change
t t t t t t t t t t t t
1. Charcoal burns t
2. Mixing cake batter with water t t t t
