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Questions and Answers
What letter symbol is used to represent the factor 109?
What letter symbol is used to represent the factor 109?
G
How many mm are in 3.20 cm?
How many mm are in 3.20 cm?
32.0
What is the volume of a 2.50 gram block of metal whose density is 6.72 grams per cubic centimeter?
What is the volume of a 2.50 gram block of metal whose density is 6.72 grams per cubic centimeter?
0.371
Select the longest distance. (1 in = 2.54 cm; 1 ft = 12 in = 0.33 yd = 0.303 m)
Select the longest distance. (1 in = 2.54 cm; 1 ft = 12 in = 0.33 yd = 0.303 m)
A cube of 1.2 inches on the side has a mass of 36 grams. What is the density in g/mL?
A cube of 1.2 inches on the side has a mass of 36 grams. What is the density in g/mL?
If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd)
If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd)
Please calculate the volume in liters occupied by carbon monoxide (CO) in a room that measures 17.6 m long, 8.80 m wide, and 2.64 m high.
Please calculate the volume in liters occupied by carbon monoxide (CO) in a room that measures 17.6 m long, 8.80 m wide, and 2.64 m high.
Prolonged exposure to mercury (Hg) vapor can cause neurological disorder and respiratory problems. For safe air quality control, the concentration of mercury vapor must be under 0.050 mg/m3. Convert this number to g/L.
Prolonged exposure to mercury (Hg) vapor can cause neurological disorder and respiratory problems. For safe air quality control, the concentration of mercury vapor must be under 0.050 mg/m3. Convert this number to g/L.
The general test for type (II) diabetes is that the blood sugar (glucose) must be below 120 mg per deciliter (mg/dL). Please convert this number to µg/mL.
The general test for type (II) diabetes is that the blood sugar (glucose) must be below 120 mg per deciliter (mg/dL). Please convert this number to µg/mL.
A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.11 g/mL, 1.81 g/mL, 1.95 g/mL, 1.75 g/mL. If the actual value for the density of the sugar solution is 1.75 g/mL, which statement below best describes her results?
A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.11 g/mL, 1.81 g/mL, 1.95 g/mL, 1.75 g/mL. If the actual value for the density of the sugar solution is 1.75 g/mL, which statement below best describes her results?
Density is defined as the ratio of the mass of an object to its volume. Looking at the small- particle views of water as a solid, liquid, and gas, which phase has the highest density?
Density is defined as the ratio of the mass of an object to its volume. Looking at the small- particle views of water as a solid, liquid, and gas, which phase has the highest density?
If you had equal masses of each of the following substances, which would occupy the greatest volume?
If you had equal masses of each of the following substances, which would occupy the greatest volume?
A graduated cylinder is filled with water to the 25.0 mL mark. After 27.5 g of titanium dioxide (TiO2) is added, the volume is 31.5 mL. Calculate the density of the TiO2 to the correct number of significant figures.
A graduated cylinder is filled with water to the 25.0 mL mark. After 27.5 g of titanium dioxide (TiO2) is added, the volume is 31.5 mL. Calculate the density of the TiO2 to the correct number of significant figures.
Which pure substances are compounds?
Which pure substances are compounds?
Identify the INCORRECT statement.
Identify the INCORRECT statement.
Which answer includes all the following that are chemical changes and not physical changes?
Which answer includes all the following that are chemical changes and not physical changes?
Which of the following is an intensive property of chlorine?
Which of the following is an intensive property of chlorine?
Which of the following is an extensive property of hydrogen?
Which of the following is an extensive property of hydrogen?
Flashcards
109 factor symbol
109 factor symbol
The letter 'n' is used to represent the factor 109.
mm in 3.20 cm
mm in 3.20 cm
There are 32 mm in 3.20 cm.
Volume of 2.50 g metal block
Volume of 2.50 g metal block
A 2.50 gram block of metal, with a density of 6.72 grams per cubic centimeter, has a volume of approximately 0.372 cubic centimeters.
Longest distance among options
Longest distance among options
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Density of 1.2 in cube
Density of 1.2 in cube
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Gallons of paint needed for 955 sq ft room
Gallons of paint needed for 955 sq ft room
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g/cm^3 to kg/L conversion
g/cm^3 to kg/L conversion
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g/mL to kg/m^3 conversion
g/mL to kg/m^3 conversion
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Volume of CO in room (liters)
Volume of CO in room (liters)
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0.050 mg/m^3 to g/L
0.050 mg/m^3 to g/L
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120 mg/dL to µg/mL
120 mg/dL to µg/mL
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Precise and accurate results
Precise and accurate results
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Density of phases of water
Density of phases of water
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Substance with greatest volume
Substance with greatest volume
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Study Notes
Cumulative Recitation #1
-
Units and Conversions:
- 1 kg = 2.205 pounds (lb)
- 1 kg = 35.27 ounces (oz)
- 1 m = 39.37 inches (in) = 3.281 feet (ft) = 1.094 yards (yd)
- 1 km = 0.6214 mile (mi)
- 1 in = 2.54 cm (exactly)
- 1 m³ = 35.31 ft³ = 1000 liters (L) (exactly)
- 1 L = 0.2642 gallon (gal) = 1.057 quarts (qt)
- Factor 10⁻¹ is represented by the letter 'd'
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Metric Conversions:
- Convert 3.20 cm to mm: 32.0 mm
- Convert 2.50 g block of metal (density 6.72 g/cm³) to volume: 0.373 cm³
- Longest distance from options: Calculate each option to meters then compare
- Convert a 1.2 in³ cube of 36 grams to density: 235g/mL
- Find gallons of 955 ft² with 15 sq yd/gal: 10 gallons
- Convert the average density of human brain (0.90 g/cm³) to kg/L: 0.90 g/cm³ = 0.90 kg/L
-
Density Conversions:
- Density of earth = 4 g/mL to kg/m³ is 4000 kg/m³
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Volume Calculation:
- Calculate volume in liters of a room (17.6 m long, 8.80 m wide, and 2.64 m high): 322.3 L
- Convert 0.050 mg/m³ to g/L: 0.00005 g/L
- Convert 120 mg/dL (blood sugar) to µg/mL: 1200 µg/mL
Additional Concepts
- Density: Defined as the ratio of mass to volume. A key concept in determining the volume occupied by a given mass of a substance.
- Significant Figures: Critical when reporting the results of calculations, particularly with density problems
- Precise vs. Accurate: In experimental results, precise measurements are close together, while accurate measurements are close to the true value.
Density Experiment
- A student's experimental results in determining sugar solution density are given. The student's results are accurate because they are close to the actual value (although precise values would be better)
Particle Views
- Comparing particle views: Density trends in the states of matter (solid, liquid, gas)
- Evidence of density change within phases (e.g., solid water is less dense than liquid water).
Substance Volume
- Calculate the substance with the greatest volume when all masses are identical: Substance with the lowest density occupies the greatest volume.
Titanium Dioxide Density
- Calculate density: Given the volume change and the mass added calculate the density.
Pure Substances & Compounds
- Identify which pure substances are compounds.
Chemical vs. Physical Changes
- Identify the chemical changes from the list of examples.
Intensive & Extensive Properties
- Identify intensive properties for chlorine (e.g., boiling point).
- Distinguish between extensive (dependent on amount) and intensive properties (not dependent on amount).
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