Talc is a mineral that has low conductivity for heat

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General Chemistry
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Chapter 1 / Exercise 1.118
General Chemistry
Ebbing/Gammon
Expert Verified
39.Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d= 1.75 g/cm3). What is the density of talc?A) 4.61 g/cm3B) 2.82 g/cm3C) 2.63 g/cm3D) 2.44 g/cm3E) 1.61 g/cmAns: B
3
Difficulty: H40.Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?
43.4°F
Difficulty: M41.Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?
–190.8 K
Difficulty: E42.Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?
103.7°C
Difficulty: MPage 7
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General Chemistry
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Chapter 1 / Exercise 1.118
General Chemistry
Ebbing/Gammon
Expert Verified
Chapter 1: Keys to the Study of Chemistry43.Which one of the following numbers contains a digit or digits which is/are not significant?A) 970.0 B) 502 C) .300 D) .0043 Ans: D
E) 20.01
Difficulty: E44.Select the answer that expresses the result of this calculation with the correct number of significant figures. 13.602 1.90 3.064.2 1.4097=
E) 13
Difficulty: H45.Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units.16.18 cm 9.6114 g 1.4783 cm2=
Difficulty: M46.Which measurement is expressed to 4 significant figures?
62.40 g
Difficulty: E47.Express 96,342 m using 2 significant figures.A)9.60 104mD)9.6 10–4B)9.6 104mE)96000. mC)9.60 10–4Ans: B
m
m
Difficulty: E48.Select the answer with the correct number of decimal places for the following sum:13.914 cm + 243.1 cm + 12.00460 cm =
Difficulty: MPage 8
Chapter 1: Keys to the Study of Chemistry49.The appropriate number of significant figures in the result of 15.234 15.208 is
E) 6.
Difficulty: M50.The appropriate number of significant figures in the result of 15.234 – 15.208 is
E) 5.
Difficulty: M51.The result of (3.8621 1.5630) – 5.98 is properly written asA) 0.06. B) 0.056. C) 0.0565. D) 0.05646. E) Ans: A
0.056462.
Difficulty: M52.As chief chemist at Superior Analytical Products (SAP) you must design an experiment to determine the density of an unknown liquid to three (3) significant figures. The density is of the order of 1 g/cm3. You have approximately 7 mL of the liquid and only graduated cylinders and balances are available for your use. Which of the following combinations of equipment will allow you to meet but not exceed your goal?
Difficulty: M

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