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Name: Class: Date: IGC Chapter 1 Free Response Copyright Macmillan Learning. Powered by Cognero. Page 1 1.What is the name and symbol for the SI unit of length?
ANSWER: meter, m
2.Rank the following volume units from smallest to largest: nl, L, mL, cL, kL.
ANSWER: nL < mL < cL < L < kL
3.Give the symbol and numerical meaning for the prefix micro-.
ANSWER: μ, 10
6
4.Convert 450.7 g to kilograms.
ANSWER: 0.4507 kg
5.Convert 3.87 nm to meters.
ANSWER: 3.87 × 10
-9 6.Calculate the volume in cubic centimeters of a rectangular box that is 4.69 cm by 9.72 mm by 0.0521 m.
ANSWER: 23.8 cm
3 7.How many significant digits are in the following value? 156.100
ANSWER: six
8.Solve the following problem and round the answer to the correct number of significant digits.
ANSWER: 0.010
9.A sample with a mass of 4.074 g was placed in a beaker with a mass of 125.6 g. What is the combined mass of the beaker and sample? Report your answer with the proper number of significant digits.
ANSWER: 130.0 g
10.The astronomical unit (au) is a unit of distance used in astronomy and is equivalent to the mean distance between Earth and the sun. One au is equal to 1.496 × 10 11
- The closest Pluto and Earth get to each other
during their orbits is approximately 28 au. How many kilometers is the distance between Earth and Pluto at this point?
ANSWER: 4.2 × 10
9 km 11.The average life expectancy in the United States is 78.7 years. Given that there are 365.25 days in a year, exactly 24 hours in a day, exactly 60 minutes in an hour, and exactly 60 seconds in a minute, calculate the number of minutes that the average American lives.
ANSWER: 4.14 × 10
7 min 12.Standard-sized dice that are used in games and gambling are approximately cubic in shape and 16 mm in length on each side. Given that there are exactly 10 mm in 1 cm, calculate the volume of a die in units of cubic centimeters. Assume that the die is completely cubic in shape.Achieve for Interactive General Chemistry 2.0 Atoms First 2nd Edition By Macmillan Learning (Test Bank All Chapters, 100% Original Verified, A+ Grade) 1 / 4
Name:
Class:
Date:
IGC Chapter 1 Free Response
Copyright Macmillan Learning. Powered by Cognero. Page 2
ANSWER: 4.1 cm
3
- Cooking oil has a density of 0.92 g/mL. Calculate the mass of a teaspoon of cooking oil, which is equivalent
to 4.93 mL.
ANSWER: 4.5 g
- An unknown metal object with a mass of 12.346 g was placed in a graduated cylinder that initially
contained 25.0 mL of water. After the object was submerged in the water, the volume of the water and the object was measured to be 26.7 mL. Calculate the density of the object and use the following table to determine the identity of the object.
Metal Density (g/mL) Copper 8.96 Aluminum 2.70 Zinc 7.13 Tin 7.26
ANSWER: 7.3 g/mL; Tin
- When added to water, octane will form a layer on the surface of the water. Iron will sink when added to
water. Rank the densities of these substances from lowest to highest.
ANSWER: octane < water < iron
- Helium's boiling point is 4.222 K. Calculate helium's boiling point in degrees Fahrenheit.
ANSWER: –452.07 °F
- The lowest recorded temperature on Earth was –89.2 °C at the Soviet Vostok Station in Antarctica in 1983.
Calculate this temperature in degrees Fahrenheit.
ANSWER: –128.6 °F
- The surface temperature of the sun is, on average, 5778 K. What is the surface temperature in degrees
Celsius?
ANSWER: 5505°C
- Which metal in the following table has the highest melting point?
Metal Melting Point Gold 1948°F Silver 1234 K Platinum 1768°C
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Name:
Class:
Date:
IGC Chapter 1 Free Response
Copyright Macmillan Learning. Powered by Cognero. Page 3
ANSWER: Platinum
- The density of gasoline ranges from 0.71 to 0.77 g/mL. What is the mass range, in pounds, of gasoline
added to a car that has a 15.35-gal tank? Assume the tank was empty before it was completely filled with gasoline. (1 gal = 3.785 L; 1 lb = 453.6 g)
ANSWER: 91 lb - 99lb
- Crater Lake in Oregon is approximately 9.7 km long and 8.0 km wide, and has an average depth of 350 m.
Assuming that the lake has the three-dimensional shape of a rectangular prism, calculate the volume of Crater Lake and round the answer to the correct number of significant figures.
ANSWER: 27 km
3
- The surface area of the Caspian Sea is approximately 1.4 × 10
5 square miles. Given that there are 1.609 km in one mile, calculate the surface area of the Caspian Sea in square meters and round the answer to the correct number of significant figures.
ANSWER: 3.6 × 10
11 m 2
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Name:
Class:
Date:
IGC Chapter 1 Multiple Choice
Copyright Macmillan Learning. Powered by Cognero. Page 1
- Select the pure substance.
- air (a mixture of nitrogen and oxygen)
- seawater (water with dissolved salts)
- water (a compound of hydrogen and oxygen)
- brass (a mixture of copper and zinc)
ANSWER: c
- Which are considered pure substances?
- elements only
- compounds only
- elements and compounds
- elements, compounds, and homogeneous mixtures
- elements, compounds, homogeneous mixtures, and heterogeneous mixtures
ANSWER: c
- Select the true statement.
- All compounds are mixtures.
- Only elements are pure substances.
- Pure substances cannot consist of more than one type of element.
- A compound consists of two or more elements.
ANSWER: d
- Suppose you have two different brands of baking powder that are each uniform throughout. However, the
- element
- compound
- homogeneous mixture
- heterogeneous mixture
labels show that one brand has a higher sodium content than the other. Classify baking powder.
ANSWER: c
- In a cup, there is orange juice containing pulp and a few ice cubes. Which choice best describes the contents
- element
- compound
- homogeneous mixture
- heterogeneous mixture
of the cup?
ANSWER: d
- What term BEST describes the mixture formed when a substance is dissolved in water?
- heterogenous mixture
- solid-phase solution
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