Portage Learning CHEM 103 General Chemistry
I Lab Guide
Comprehensive 250 Question Final Exam & Practical Review
Modules 1 - 8 (Labs 1 - 8)
Module 1: Lab 1 – Metric System, Laboratory Equipment &
Density
Question 1: What metric base unit is used to measure volume?
Correct Answer: Litre (L)
Question 2: Define density in terms of mass and volume.
Correct Answer: Density = Mass / Volume (d = m/V)
Question 3: If a solid object has a mass of 45.0 grams and displaces 15.0 mL of water, what is its
density?
Correct Answer: 3.00 g/mL
Question 4: Which laboratory tool is most precise for measuring exactly 25.00 mL of liquid?
Correct Answer: Volumetric pipette
Question 5: Convert 250 milligrams (mg) to grams (g).
Correct Answer: 0.250 g
Question 6: What physical property describes the ratio of an object's mass to its volume?
Correct Answer: Density
Question 7: What type of meniscus do you read when measuring water in a graduated cylinder?
Correct Answer: Concave meniscus (read at the lowest point)
Question 8: How many significant figures are in the measurement 0.00450 grams?
Correct Answer: Three (4, 5, 0)
Question 9: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #8)
Correct Answer: 1 mL
Question 10: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #9)
Correct Answer: 1 mL
Question 11: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #10)
Correct Answer: 7.89 g
,Question 12: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #11)
Correct Answer: 7.89 g
Question 13: State the SI prefix representing 10^-3. (Variant Variation #12)
Correct Answer: Milli- (m)
Question 14: State the SI prefix representing 10^-3. (Variant Variation #13)
Correct Answer: Milli- (m)
Question 15: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #14)
Correct Answer: Safety goggles / protective eyewear
Question 16: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #15)
Correct Answer: Safety goggles / protective eyewear
Question 17: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #16)
Correct Answer: True
Question 18: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #17)
Correct Answer: True
Question 19: Identify the standard unit for temperature in chemical thermodynamic calculations.
(Variant Variation #18)
Correct Answer: Kelvin (K)
Question 20: Identify the standard unit for temperature in chemical thermodynamic calculations.
(Variant Variation #19)
Correct Answer: Kelvin (K)
Question 21: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #20)
Correct Answer: 1 mL
Question 22: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #21)
Correct Answer: 1 mL
Question 23: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #22)
Correct Answer: 7.89 g
Question 24: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #23)
Correct Answer: 7.89 g
Question 25: State the SI prefix representing 10^-3. (Variant Variation #24)
Correct Answer: Milli- (m)
Question 26: State the SI prefix representing 10^-3. (Variant Variation #25)
Correct Answer: Milli- (m)
, Question 27: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #26)
Correct Answer: Safety goggles / protective eyewear
Question 28: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #27)
Correct Answer: Safety goggles / protective eyewear
Question 29: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #28)
Correct Answer: True
Question 30: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #29)
Correct Answer: True
Module 2: Lab 2 – Heat of Fusion of Ice & Calorimetry
Question 31: What is the theoretical value for the heat of fusion of ice in J/g?
Correct Answer: 334 J/g
Question 32: State the first law of thermodynamics relative to calorimetry.
Correct Answer: Energy cannot be created or destroyed; heat lost by the system equals heat gained by
the surroundings (-q_lost = q_gained).
Question 33: What equation is used to calculate the heat absorbed by water in a calorimeter?
Correct Answer: q = m * c * delta T
Question 34: What is the specific heat capacity of liquid water?
Correct Answer: 4.184 J/g°C
Question 35: Does the melting of ice represent an endothermic or exothermic process?
Correct Answer: Endothermic
Question 36: What device is used to insulate a reaction mixture to prevent external heat exchange?
Correct Answer: Calorimeter (e.g., coffee-cup calorimeter)
Question 37: What phase change occurs during the heat of fusion transition? (Variant Variation #6)
Correct Answer: Solid to liquid
Question 38: What phase change occurs during the heat of fusion transition? (Variant Variation #7)
Correct Answer: Solid to liquid
Question 39: Define specific heat capacity. (Variant Variation #8)
Correct Answer: The amount of heat required to raise the temperature of 1 gram of a substance by 1
degree Celsius.
Question 40: Define specific heat capacity. (Variant Variation #9)
Correct Answer: The amount of heat required to raise the temperature of 1 gram of a substance by 1
degree Celsius.
I Lab Guide
Comprehensive 250 Question Final Exam & Practical Review
Modules 1 - 8 (Labs 1 - 8)
Module 1: Lab 1 – Metric System, Laboratory Equipment &
Density
Question 1: What metric base unit is used to measure volume?
Correct Answer: Litre (L)
Question 2: Define density in terms of mass and volume.
Correct Answer: Density = Mass / Volume (d = m/V)
Question 3: If a solid object has a mass of 45.0 grams and displaces 15.0 mL of water, what is its
density?
Correct Answer: 3.00 g/mL
Question 4: Which laboratory tool is most precise for measuring exactly 25.00 mL of liquid?
Correct Answer: Volumetric pipette
Question 5: Convert 250 milligrams (mg) to grams (g).
Correct Answer: 0.250 g
Question 6: What physical property describes the ratio of an object's mass to its volume?
Correct Answer: Density
Question 7: What type of meniscus do you read when measuring water in a graduated cylinder?
Correct Answer: Concave meniscus (read at the lowest point)
Question 8: How many significant figures are in the measurement 0.00450 grams?
Correct Answer: Three (4, 5, 0)
Question 9: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #8)
Correct Answer: 1 mL
Question 10: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #9)
Correct Answer: 1 mL
Question 11: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #10)
Correct Answer: 7.89 g
,Question 12: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #11)
Correct Answer: 7.89 g
Question 13: State the SI prefix representing 10^-3. (Variant Variation #12)
Correct Answer: Milli- (m)
Question 14: State the SI prefix representing 10^-3. (Variant Variation #13)
Correct Answer: Milli- (m)
Question 15: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #14)
Correct Answer: Safety goggles / protective eyewear
Question 16: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #15)
Correct Answer: Safety goggles / protective eyewear
Question 17: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #16)
Correct Answer: True
Question 18: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #17)
Correct Answer: True
Question 19: Identify the standard unit for temperature in chemical thermodynamic calculations.
(Variant Variation #18)
Correct Answer: Kelvin (K)
Question 20: Identify the standard unit for temperature in chemical thermodynamic calculations.
(Variant Variation #19)
Correct Answer: Kelvin (K)
Question 21: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #20)
Correct Answer: 1 mL
Question 22: What is the equivalent volume of 1 cm^3 in milliliters? (Variant Variation #21)
Correct Answer: 1 mL
Question 23: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #22)
Correct Answer: 7.89 g
Question 24: Calculate the mass of a liquid with a density of 0.789 g/mL and volume of 10.0 mL.
(Variant Variation #23)
Correct Answer: 7.89 g
Question 25: State the SI prefix representing 10^-3. (Variant Variation #24)
Correct Answer: Milli- (m)
Question 26: State the SI prefix representing 10^-3. (Variant Variation #25)
Correct Answer: Milli- (m)
, Question 27: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #26)
Correct Answer: Safety goggles / protective eyewear
Question 28: What piece of safety equipment must always be worn during chemistry labs? (Variant
Variation #27)
Correct Answer: Safety goggles / protective eyewear
Question 29: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #28)
Correct Answer: True
Question 30: True or False: Electronic balances should be tared before weighing a sample. (Variant
Variation #29)
Correct Answer: True
Module 2: Lab 2 – Heat of Fusion of Ice & Calorimetry
Question 31: What is the theoretical value for the heat of fusion of ice in J/g?
Correct Answer: 334 J/g
Question 32: State the first law of thermodynamics relative to calorimetry.
Correct Answer: Energy cannot be created or destroyed; heat lost by the system equals heat gained by
the surroundings (-q_lost = q_gained).
Question 33: What equation is used to calculate the heat absorbed by water in a calorimeter?
Correct Answer: q = m * c * delta T
Question 34: What is the specific heat capacity of liquid water?
Correct Answer: 4.184 J/g°C
Question 35: Does the melting of ice represent an endothermic or exothermic process?
Correct Answer: Endothermic
Question 36: What device is used to insulate a reaction mixture to prevent external heat exchange?
Correct Answer: Calorimeter (e.g., coffee-cup calorimeter)
Question 37: What phase change occurs during the heat of fusion transition? (Variant Variation #6)
Correct Answer: Solid to liquid
Question 38: What phase change occurs during the heat of fusion transition? (Variant Variation #7)
Correct Answer: Solid to liquid
Question 39: Define specific heat capacity. (Variant Variation #8)
Correct Answer: The amount of heat required to raise the temperature of 1 gram of a substance by 1
degree Celsius.
Question 40: Define specific heat capacity. (Variant Variation #9)
Correct Answer: The amount of heat required to raise the temperature of 1 gram of a substance by 1
degree Celsius.
