Chapter 3 Chemistry

49) What is the value of 98 °F in units of °C? A) 72 B) 37 C) 371 D) 22 E) none of the above

B) 37

47) What is the value of 27°C on the Kelvin temperature scale? A) 273 B) 246 C) 300 D) 81 E) none of the above

C) 300

37) How many calories are there in a 255 Calorie snack bar? A) 2.55 × 105 B) 1.07 × 103 C) 60.9 D) 1 × 103 E) none of the above

A) 2.55 × 105

4) What is the value of -25°C on the Kelvin scale? A) 248 B) -32 C) -13 D) -298 E) none of the above

A) 248

5) What is the value of 23°C on the Fahrenheit scale? A) 73 B) 52 C) 59 D) 81

A) 73

9) Given the table of specific heat values below, what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed? Element Specific Heat(J/g°C) Au 0.128 Ag 0.235 Cu 0.385 Fe 0.449 Al 0.903 A) Fe B) Al C) Au D) Ag E) none of the above

A) Fe

4) Which state of matter has atomic spacing that is close together and indefinite shape? A) liquid B) solid C) gas D) plasma E) none of the above

A) liquid

19) How would you classify sugar? A) pure substance-compound B) mixture-heterogeneous C) pure substance-element D) mixture-homogeneous E) none of the above

A) pure substance-compound

28) Which of the following is NOT a technique that could be used to separate a mixture into its components? A) stirring B) decanting C) filtration D) distillation E) none of the above

A) stirring

58) When 49.5 J of heat was transferred to 7.3 g iron at 22°C, the temperature of iron increases to 37°C. What is the specific heat of iron in J/g∙°C? A) 4.5 B) 0.45 C) 2.2 D) 24 E) none of the above

B) 0.45

51) Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of the chemical acetone is -95°C. Which state of matter would you expect to exist for acetone at a temperature of -94°C? A) solid B) liquid C) gas D) plasma

B) liquid

11) What is the final temperature of 25.0 grams of water at 22.0°C after it absorbs of heat? A) 17.7 B) 4.29 C) 26.3 D) 15.8 E) none of the above

C) 26.3

34) Which type of energy is associated with position? A) chemical B) electrical C) potential D) kinetic E) none of the above

C) potential

33) Which type of energy is associated with motion? A) chemical B) electrical C) potential D) kinetic E) none of the above

D) kinetic

25) Which of the following items is a chemical property? A) the paint color on a new red Corvette B) the odor of spearmint gum C) the melting and boiling point of water D) the tarnishing of a copper statue E) none of the above

D) the tarnishing of a copper statue

43) In order, what is the freezing point, room temperature and boiling point of water according to the Fahrenheit scale? A) 32-75-212 B) 0-75-100 C) 0-25-100 D) 0-298-373 E) none of the above

A) 32-75-212

31) When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 9 grams of water and 11 grams of carbon dioxide from 16 grams of oxygen, how many grams of methane were needed for the reaction? A) 4 B) 20 C) 31 D) 40 E) none of the above

A) 4

50) What is the value of 335 K on the Celsius temperature scale? A) 62 B) 167 C) 608 D) 66.4 E) none of the above

A) 62

8) Given the table of specific heat values below, what is the identity of a 10.0 g metal sample that increases by when of energy is absorbed? Element Specific Heat(J/g°C) Au 0.128 Ag 0.235 Cu 0.385 Fe 0.449 Al 0.903 A) Fe B) Al C) Au D) Ag E) none of the above

A) Fe

2) How many Calories are in 575.0 calories? A) 575,000 B) 0.5750 C) 137.6 D) 2,404 E) none of the above

B) 0.5750

59) Suppose it took 108 joules of energy to raise a bar of gold from 25.0°C to 29.7°C. Given that the specific heat capacity of gold is , what is the mass (in grams) of the bar of gold? A) 6.5 × 101 g B) 1.8 × 102 g C) 1.28 × 102 g D) 1.08 × 102 g E) none of the above

B) 1.8 × 102 g

30) When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction? A) 40 B) 22 C) 58 D) 18 E) none of the above

B) 22

53) A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat. Given the specific heat of lead is 0.128 J/g∙°C, what is the final temperature of the lead? A) 21.1°C B) 46.1°C C) 77.8°C D) 0.844°C E) none of the above

B) 46.1°C

1) A sample of 508.4 grams of copper completely reacted with oxygen to form 572.4 grams of a copper oxide product. How many grams of oxygen must have reacted? A) 636.4 B) 64.0 C) 32.0 D) 572.4 E) 508.4 F) none of the above

B) 64.0

10) A pure substance is: A) composed of two or more different types of atoms or molecules combined in variable proportions. B) composed of only one type of atom or molecule. C) composed of two or more regions with different compositions. D) composed of two or more different types of atoms or molecules that has constant composition. E) none of the above

B) composed of only one type of atom or molecule.

41) An energy diagram that shows the reactants having greater energy than the products illustrates an: A) endothermic reaction. B) exothermic reaction. C) isothermic reaction. D) impossible reaction. E) none of the above

B) exothermic reaction.

18) How would you classify raisin bran? A) pure substance-compound B) mixture-heterogeneous C) pure substance-element D) mixture-homogeneous E) none of the above

B) mixture-heterogeneous

27) If you hold a solid piece of pure gallium metal in your hand, your body heat will melt the gallium into its liquid form. This illustrates which of the following? A) distillation B) physical change C) chemical change D) chemical property E) none of the above

B) physical change

9) Which of the following is an example of a crystalline solid that shows an arrangement of longrange, repeating order? A) glass B) salt C) plastic D) rubber E) none of the above

B) salt

6) Which state of matter has atomic spacing that is close together and definite shape? A) liquid B) solid C) gas D) plasma E) none of the above

B) solid

8) Which state of matter has atomic spacing that is far apart and definite shape? A) liquid B) solid C) gas D) plasma E) none of the abov

B) solid

14) Which of the following is a homogeneous mixture? A) trail mix B) stainless steel C) water D) molten iron E) none of the above

B) stainless steel

23) Which of the following items is a physical property? A) the corrosive action of acid rain on granite B) the odor of spearmint gum C) the combustion of gasoline D) the tarnishing of a copper statue E) none of the above

B) the odor of spearmint gum

36) Which of the following items is NOT a common unit of energy? A) joule B) torr C) calorie D) kilowatt-hour E) none of the above

B) torr

44) In order, what is the freezing point, room temperature and boiling point of water according to the Celsius scale? A) 32-75-212 B) 0-75-100 C) 0-25-100 D) 0-298-373 E) none of the above

C) 0-25-100

54) What is the specific heat (J/g∙°C) of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J? A) 4.18 B) 0.15 C) 0.73 D) 1.4 E) none of the above

C) 0.73

46) The boiling point of water is: (1) 212 °F (2) 0°C (3) 373 K A) 1 and 2 only B) 2 and 3 only C) 1 and 3 only D) all of 1, 2, and 3 E) none of 1, 2, and 3

C) 1 and 3 only

38) How many joules are there in a 255 calorie snack bar? A) 2.55 × 105 B) 1.07 × 106 C) 1.07 × 103 D) 6.09 × 104 E) none of the above

C) 1.07 × 103

7) The temperature of 390 kelvin is warmer than which one of the following temperatures? A) 250 deg F B) 135 deg C C) 109 deg C D) 44 deg F E) none of the above

C) 109 deg C

39) How many kilojoules are there in 95.0 Calories? A) 2.27 × 107 B) 3.97 × 10-4 C) 397 D) 22.7 E) none of the above

C) 397

6) What is the value of 783 K in units of °C? A) 417 B) 1441 C) 510. D) 1056 E) none of the above

C) 510.

15) Which of the following statements about compounds is TRUE? A) A substance that cannot be broken down into simpler substances. B) A pure substance that has variable composition throughout. D) A substance that is not as common as pure elements. E) none of the above

C) A substance composed of two or more elements in fixed, definite proportions.

32) Which of the following statements about energy is FALSE? A) An object possessing energy can do work on another object. B) Energy can neither be created nor destroyed. C) Energy is the single main component of the universe. D) Energy is the capacity to do work. E) All of the above statements are true.

C) Energy is the single main component of the universe

24) Which of the following is NOT an example of a physical property? A) Solid ice can be very brittle. B) Water can freeze solid at 32 degrees Fahrenheit. C) Water can form hydrogen and oxygen gas under electrolysis conditions. D) Liquid water can turn into steam in a heated tea kettle. E) none of the above

C) Water can form hydrogen and oxygen gas under electrolysis conditions.

12) Which of the following items is a mixture? A) water B) helium C) brass D) sugar E) none of the above

C) brass

3) A solid form of matter in which there is long range repeating order is called ________. A) amorphous B) rigid C) crystalline D) fixed E) none of the above

C) crystalline

40) If a particular process is endothermic, the reverse process must be a (an): A) chemical change. B) isothermal process. C) exothermic process. D) endothermic process. E) none of the above

C) exothermic process.

22) All of the following can be considered physical properties EXCEPT: A) taste. B) color. C) flammability. D) density. E) boiling point.

C) flammability

5) Which state of matter has indefinite shape and is compressible? A) liquid B) solid C) gas D) plasma E) none of the above

C) gas

57) Consider the following specific heats of metals. Metal Specific Heat (J/g∙°C) Aluminum 0.903 Copper 0.385 Gold 0.128 Iron 0.449 Silver 0.235 If the same amount of heat is added to 50.0 g samples of each of the metals, which are all at the same temperature, which metal will reach the highest temperature? A) aluminum B) copper C) gold D) iron E) silver

C) gold

13) Which of the following is a heterogenous mixture? A) milk B) sugar water C) raisin bran D) air E) none of the above

C) raisin bran

21) Physical properties are: A) those that a substance displays only through changing its composition. B) those that cause atoms and molecules to change. C) those that a substance displays without changing its composition. D) identical for all solid matter. E) none of the above

C) those that a substance displays without changing its composition

55) How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to ? A) 10450 B) 0.598 C) 1.05 D) 10.5 E) none of the above

D) 10.5

12) How many grams of water when supplied with of heat will gain a temperature of 5.2°C? A) 15 B) 17 C) 19 D) 16 E) none of the above

D) 16

3) How many joules are in 55.2 calories? A) 13,200 B) 55,200 C) 13.2 D) 231 E) none of the above

D) 231

10) How much heat (kJ) is absorbed by 948.0 g of water in order for the temperature to increase from to A) 7.5 B) 31.4 C) 30.2 D) 29.7 E) none of the above

D) 29.7

29) When methane is burned with oxygen the products are carbon dioxide and water. If you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction? A) 32 B) 80 C) 96 D) 64 E) none of the above

D) 64

48) What is the value of 27°C on the Fahrenheit temperature scale? A) -6.8 B) 106 C) 300 D) 81 E) none of the above

D) 81

1) Which of the following statements about matter is FALSE? A) Matter occupies space and has mass. B) Matter exists in either a solid, liquid or gas state. C) Matter is ultimately composed of atoms. D) Matter is smooth and continuous. E) none of the above

D) Matter is smooth and continuous.

42) If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount of heat is released and the white solid sodium chloride (table salt) forms. Based on this information, which of the following statements is TRUE? A) This process represents a physical change. B) Mass is lost during this process. C) Sodium chloride is an element. D) The process was exothermic E) none of the above

D) The process was exothermic

45) Which of the following is NOT true? A) The degree "symbol" is not used with the Kelvin scale. B) A kelvin degree is the same size as a Celsius degree. C) The Kelvin temperature scale avoids use of negative numbers. D) Water boils at the same temperature value on both the Kelvin and Celsius scales. E) none of the above

D) Water boils at the same temperature value on both the Kelvin and Celsius scales.

35) What type of energy is associated with the burning of gasoline? A) kinetic B) potential C) electrical D) chemical E) none of the above

D) chemical

2) Which of the following is NOT an example of matter? A) a pencil eraser B) a balloon full of helium C) a dust particle D) heat from a burning candle E) none of the above

D) heat from a burning candle

20) A solution is an example of a (an): A) pure substance. B) element. C) compound. D) homogeneous mixture. E) heterogeneous mixture.

D) homogeneous mixture.

11) Which of the following items is a pure substance? A) air B) seawater C) brass D) ice E) none of the above

D) ice

17) How would you classify salt water? A) pure substance-compound B) mixture-heterogeneous C) pure substance-element D) mixture-homogeneous E) none of the above

D) mixture-homogeneous

56) From the following list of substances and heat capacities, choose the one that will have the lowest temperature after absorbing 100.0 kJ of heat. Assume identical masses of each substance start at the same initial temperature. A) lead-0.128 J/g∙°C B) copper-0.385 J/g∙°C C) ethanol-2.42 J/g∙°C D) water-4.18 J/g∙°C E) not enough information

D) water-4.18 J/g∙°C

16) Which of the following statements is FALSE? A) Matter may be a pure substance or it may be a mixture. B) A pure substance may either be an element or a compound. C) A mixture may be either homogeneous or heterogeneous. D) Mixtures may be composed of two or more elements, two or more compounds, or a combination of both. E) All of the above statements are true.

E) All of the above statements are true.

26) Which of the following statements about physical and chemical changes is FALSE? A) In a chemical change, matter changes its composition. B) In a physical change, matter does not change its composition. C) Phase changes are always physical changes. D) Chemical reactions are chemical changes. E) All of the above statements are true.

E) All of the above statements are true.

52) In calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by which symbol? A) C B) q C) ΔT D) m E) K

E) K

7) Which among the following statements is FALSE? A) A solid has a definite shape and a definite volume. B) A liquid has a definite volume; but it has no definite shape. C) A gas has neither definite volume nor definite shape. D) Both solids and liquids are incompressible while gases are compressible. E) none of the above

E) none of the above