Chem 101 Chapter 1

Which value is closest to the mass of a 2-pound box of laundry detergent? A) 2.0 × 10-4 cg B) 4.5 × 103 ng C) 1 kg D) 9 × 109 mg E) 200 g

C 1 kg

Xylene, a compound with the formula C8H10, is composed of. A) eight atoms of calcium and ten atoms of helium. B) any combination of atoms of carbon and hydrogen that add up to 18 total. C) any combination of atoms of carbon and hydrogen in a four to five ratio. D) ten atoms of carbon and eight atoms of hydrogen. E) eight atoms of carbon and ten atoms of hydrogen.

E. Eight atoms of carbon and ten atoms of hydrogen

All of the following are examples of matter except. A) air. B) water. C) plants. D) salt. E) heat.

E. Heat

Which of the following is a chemical property of aspirin? A) It does not readily dissolve in water. B) It is a white crystalline solid in pure form at room temperature. C) It can be compressed into tablets when mixed with cornstarch. D) It melts at 135°C. E) It does not decompose when protected from moisture

E. It does not decompose when protected from moisture

Which of the following can be classified as a pure compound? A) Sulfur, S8 B) alcohol in water, C2H5OH in H2O C) carbon, C D) iodine, I2 E) sugar, C12H22O11

E. Sugar, C12H22O11

A chemist is given an unknown sample. Which of her observations is not a physical property? A) The sample size is 55 mL. B) The sample is a colorless liquid. C) The density of the liquid is 0.789 g/mL. D) The sample has an odor similar to gasoline. E) The sample is flammable.

E. The sample is flammable

The metric unit used to measure volume is the A) meter. B) gram. C) Kelvin. D) gram per cubic centimeter. E) liter.

E. liter

Which of the following represents the largest unit? A) kiloliter B) deciliter C) milliliter D) dekaliter E) megaliter

E. megaliter

Which choice best describes the degree of uncertainty in the measurement 16.30 g? A) The uncertainty cannot be determined without additional information. B) The quantity is exact. C) ±1.00 g D) ±0.01 g E) ±0.10 g

D. 0.01 g

The dosage of quinine when a 145-lb adult takes a 200.-mg tablet is ________ µg drug per kg of body weight. A) 1.60 × 103 B) 15.2 C) 4.41 × 105 D) 3.04 × 103 E) 1.38 × 106

D. 1.38 * 106

What is the numerical value of 1.2 × 1.222? Express your answer using the correct number of significant figures. A) 1.47 B) 1.4664 C) 1.466 D) 1.5 E) none of the above

D. 1.5

An extra-strength aspirin contains 0.500 g of aspirin. How many grains is this? (1 grain = 64.8 mg) A) 13.0 grains B) 32.4 grains C) 65.3 grains D) 7.72 grains E) 3.24 × 104 grains

D. 7.72 grains

What is the temperature at which the Celsius and Fahrenheit scales read the same? A) -100 B) -40 C) 100 D) 25 E) Never

B. -40

Calculate the density of cyclohexane if a 50.0 g sample has a volume of 64.3 mL. A) 114.3 g/mL B) 0.778 g/mL C) 1.29 g/mL D) 14.3 g/mL E) 0.322 g/mL

B. 0.778 g/mL

When the prefix centi is used in the metric system, a fundamental unit of measurement is multiplied by what factor? A) 10-3 B) 10-2 C) 106 D) 103 E) 10-6

B. 10-2

How many centimeters are there in one kilometer? A) 102 cm B) 105 cm C) 101 cm D) 10-2 cm E) 10-5 cm

B. 105 cm

What is the area of a piece of metal foil that measures 43.9 cm by 29.21 cm? Express the answer to the correct number of significant figures. A) 128 cm2 B) 1280 cm2 C) 1282.3 cm2 D) 1282.319 cm2 E) 1282.32 cm2

B. 1280 cm2

What temperature is -10.°C on the Fahrenheit scale? A) 26°F B) 14°F C) 263°F D) -18°F E) -6.0°F

B. 14F

How many significant figures should be retained in the result of the following calculation? (11.13 - 2.6) × 104 (103.05 + 16.9) × 10-6 A) 1 B) 2 C) 3 D) 4 E) 5

B. 2

Which of the following causes a chemical change? A) winding an alarm clock B) metabolizing fat C) slicing a tomato D) pumping gasoline E) digging a hole

B

If gasoline sells for 95.4 cents per liter, what is its cost on a per gallon basis? 1 L = 1.06 qt A) $3.82 B) $3.60 C) $4.04 D) $36.00 E) $404.50

B. $3.60

In which of the following numbers are all of the zeros not significant? A) 5408 B) 0.0450 C) 3300 D) 45.060 E) 607.80

C. 330

The number 5.320 × 102 in conventional notation is A) 53.20. B) 0.005320. C) 0.5320. D) 532.0. E) 5.320.

D. 532.0

What is 2.1 × 10-5 written in decimal notation? A) 0.000 021 B) 210 C) 0.000 21 D) 210,000 E) 2,100,000

A. 0.000021

How many quarts are contained in 450. mL? A) 0.475 quarts B) 0.426 quart C) 475 quarts D) 2.10 quarts E) 426 quarts

A. 0.475 quarts

The conversion factor used to convert 55.6 km to miles is A) 1 mile 1.61 km . B) 1.61 km 1 mile . C) 1 km 1.61 miles . D) 1 km 1000 m . E) 1.61 miles 1 km .

A. 1 m 1.61 km

How long is 1 cm? A) 10 mm B) 0.01 mm C) 1000 mm D) 100 mm E) 1 mm

A. 10 mm

How many inches are contained in 25.4 cm? A) 10.0 inches B) 100 inches C) 64.5 inches D) 25.4 inches E) 0.10 inches

A. 10.0 inches

125 cL is the same as all of these except A) 125 cubic liter. B) 125 centiliter. C) 1.25 liter. D) 12.5 deciliter. E) 1250 milliliter.

A. 125 cubic liter

What temperature is 75°F on the Kelvin scale? A) 297 K B) 43 K C) 348 K D) 24 K E) 215 K

A. 297 K

If 55.0 g of olive oil has 877 cal of heat added to it at a room temperature of 26.0°C, what will be the final temperature of the olive oil? The specific heat of olive oil is 2.19 cal/g°C. A) 33.3°C B) 26.0°C C) 7.3°C D) 3.3 °C E) 19.0°C

A. 33.3 C

A sample of an experimental medication was calculated to contain 0.392 g of active drug. How many milligrams is this? A) 392 mg B) 3.92 × 10-1 mg C) 3.92 × 103 mg D) 0.0392 mg E) 3.92 × 10-4 mg

A. 392 mg

If 75.0 g of water at 30.0°C absorbs 900 calories, the new temperature will be A) 42.0°C. B) 160°C. C) 22.0°C. D) 18.0°C. E) 105°C.

A. 42.0 C

A laboratory technician reports that the mass of a growth removed from a patient is 274.06 g. How many significant figures does this measurement contain? A) 5 B) 3 C) 2 D) 4 E) none of the above

A. 5

How many ng are there in 5.2 mg? A) 5.2 × 106 ng B) 5.2 × 109 ng C) 1.9 × 102 ng D) 5.2 × 103 ng E) 1.9 × 105 ng

A. 5.2 * 106 ng

Which value is closest to the amount of gasoline in a small car with a full tank (which contains about 13 gallons)? A) 50 L B) 85 µL C) 12 kL D) 3.5 × 102 dL E) 450 mL

A. 50 L

The measurement most likely to describe the amount of pain reliever in a headache tablet is A) 500 mg. B) 1.00 mL. C) 1.5 kg. D) 325 mg/mL. E) 0.25 L.

A. 500 mg

What temperature is 325 K on the Celsius scale? A) 52°C B) 344°C C) 126°C D) 617°C E) 598°C

A. 52C

How many grams are contained in 1.20 pounds? A) 545 g B) 378 g C) 1.20 g D) 264 g E) 2.2 g

A. 545 g

In scientific notation, the number 0.0046 is expressed as A) 4.6 × 10-1. B) 46 × 10-4. C) 4.6 × 10-2. D) 46 × 10-1. E) 4.6 × 10-3.

E. 4.6 * 10-1

Amphetamine, a commonly abused drug, is composed of nine atoms of carbon, 13 atoms of hydrogen, and one atom of nitrogen. The chemical formula of amphetamine is written A) C9H13N. B) C9H1N13. C) C9H13. D) C9H13N1 . E) C13H93N0 .

A. C9H13N

What is the chemical symbol for calcium? A) Ca B) Cr C) C D) Cu E) Cl

A. Ca

Which of the following is a chemical property? A) flammability B) temperature C) mass D) volume E) melting point

A. Flammability

1-butanethiol, one of the compounds giving skunks their distinctive odor, freezes at -115.7°C and boils at 98.5°C. What is its phase at 37°C, the normal body temperature of humans? A) liquid B) gas C) a mixture of liquid and gas D) a mixture of solid and liquid E) solid

A. Liquid

Which element is not essential for human life? A) Pb B) C C) C a D) H E) P

A. Pb

What element is represented by the chemical symbol K? A) potassium B) sodium C) silver D) phosphorus E) kaolin

A. Potassium

Malic acid, a compound used to increase the acidity of fruit-flavored products, freezes at 128°C and boils at 150°C. What is its phase at 100°C, a temperature used in food processing applications? A) solid B) liquid C) a mixture of solid and liquid D) a mixture of liquid and gas E) gas

A. Solid

The amount of matter in an object is its A) mass. B) volume. C) density. D) weight. E) specific gravity.

A. mass

Which measurement represents the smallest quantity? A) 29.5 m g B) 2950 ng C) 2.95 × 103 µg D) 2.95 × 10-6 kg E) 2.95 × 10-4 g

B. 2950 ng

How many centimeters are contained in 12.5 inches? A) 4.92 cm B) 31.8 cm C) 5.10 cm D) 492 cm E) None of the above

B. 31.8 cm

In an introductory laboratory exercise, a student was asked to measure the volume of soda in a partially filled can in metric units. Which value below is most likely to be correct? A) 550 µL B) 325 mL C) 2.5 L D) 1.0 kL E) 6.0 × 106 nL

B. 325 mL

68°C is the same as A) 321 K. B) 341 K. C) 285 K. D) 158 K. E) 205 K.

B. 341 K

Which measurement represents the largest quantity? A) 4.73 × 10-4 g B) 47.3 m g C) 4.73 × 103 µg D) 4.73 × 10-6 kg E) 4730 ng

B. 47.3 mg

Find the difference between two masses measured as 123.6 grams and 115.972 grams. Express the answer to the correct number of significant figures. A) 7.63 grams B) 7.6 grams C) 7.628 grams D) 8 grams E) 8.0 grams

B. 7.6 grams

What is the numerical value of (2.1 × 104)(4.0 × 10-2) expressed to the correct number of significant figures? A) 8.4 × 10-2 B) 8.4 × 102 C) 8.4 × 10-8 D) 8.4 E) None of the above.

B. 8.4 * 102

What is 0.0970 written in scientific notation? A) 97 × 10-3 B) 9.70 × 10-2 C) 97.0 × 10-2 D) 970 × 10-4 E) 0.97 × 10-1

B. 9.70 * 10-2

Which of the following is a physical property of aspirin? A) Aspirin yields carbon dioxide and water vapor when burned. B) Aspirin can be pressed into tablets when mixed with cornstarch. C) Aspirin reacts with water to produce salicylic acid and acetic acid. D) Aspirin can moderate some heart disorders when ingested. E) Aspirin does not decompose when tightly sealed in a bottle.

B. Aspirin can be pressed into tablets when mixed with cornstarch

What is the chemical symbol for chlorine? A) Ca B) Cl C) Cu D) Cr E) C

B. Cl

Which of the following is a mixture? A) steam B) cough syrup C) iron D) sodium hydrogen carbonate E) helium

B. Cough syrup

Which symbol does not denote a compound? A) C2H4 B) Cr C) C aCO3 D) CCl4 E) CO2

B. Cr

Which of the following is an element? A) fire B) iron C) water D) wine E) salt

B. Iron

Which of the following observations demonstrates that a solid sample is a compound? A) Heating the substance causes no visible color change. B) It cannot be broken down into simpler substances by chemical methods. C) Heating the substance causes it to melt, then to boil. D) It cannot be broken down into simpler substances by physical methods. E) Crushing the sample does not affect its other properties.

B. It cannot be broken down into simpler substances by chemical methods

Vegetable oil is a(an) ________, and is found in the ________ phase. A) compound; solid B) mixture; liquid C) element; liquid D) mixture; solid E) compound; gas

B. Mixture; liquid

The most common element by mass percent in the human body is A) phosphorus. B) oxygen C) hydrogen. D) sulfur. E) carbon.

B. Oxygen

Which of the following measurements has three significant figures? A) 0.03750 g B) 4.250 g C) 0.0250 g D) 1207 g E) 0.006 g

C. 0.0250 g

What is the specific heat of a metal if it takes 26.5 calories to raise the temperature of a piece weighing 50.0 g by 5.00 degrees Celsius? A) 250 cal/g °C B) 6.63 cal/g °C C) 0.106 cal/g °C D) 133 cal/g °C E) 1.89 cal/g °C

C. 0.106 cal/g C

What is the specific heat of a metal if it takes 48.4 calories to raise the temperature of a 45.0 g sample by 5.0°C? A) 225 cal/g °C B) 0.186 cal/g °C C) 0.215 cal/g °C D) 5.34 cal/g °C E) 242 cal/g °C

C. 0.215 cal/g C

What is the numerical value of (3.00 × 106)(2.0 × 10-3) 5.0 × 10-2 ? A) 1.2 × 1011 B) 1.2 × 103 C) 1.2 × 105 D) 1.2 E) 1.2 × 107

C. 1.2*105

What is the numerical value of 1.50 1.222 × 103 ? Express your answer using the correct number of significant figures. A) 1 × 10-3 B) 1.2 × 10-3 C) 1.23 × 10-3 D) 10-3 E) 1.227 × 10-3

C. 1.23 * 10-3

What is the volume of a gold nugget that weighs 2.20 kg? The density of gold is 19 g/cm3. A) 8.60 × 103 cm3 B) 11.6 cm3 C) 116 cm3 D) 0.116 cm3 E) 8.60 cm3

C. 116 cm3

Which of the following numbers contains five significant figures? A) 0.04910 B) 4,910,000 C) 4.9100 D) 49,100 E) 0.4910

C. 4.9100

What is the mass of 30.0 mL of a solution with a density of 1.60 g/mL? A) 31.6 g B) 18.8 g C) 48.0 g D) 53.3 g E) none of the above

C. 53.3 g

The numerical value for (5.6 × 104) ÷ (7.89 × 102) is equal to, with the proper number of significant figures: A) 7.098 × 101 B) 71.0 C) 71 D) 70.98 E) 70.976

C. 71

An object weighs 37.4 kg. What does the object weigh in the English system? 1 lb = 453.6 g A) 169.65 lb B) 370.0 lb C) 82.5 lb D) 16,965 lb E) 0.0825 lb

C. 82.5 lb

Identify the product(s) in the following reaction: calcium carbonate calcium oxide + carbon dioxide A) carbon dioxide + calcium carbonate B) calcium carbonate C) calcium oxide + carbon dioxide D) calcium carbonate + calcium oxide E) calcium carbonate + calcium oxide + carbon dioxide

C. Calcium Oxide+carbon dioxide

Each symbol denotes an element except A) Co. B) C. C) CO. D) Cl. E) Cu.

C. CO

A reddish powder is heated gently in a loosely covered container. After the heating a silvery metal remains in the container, and a glowing wooden splint placed into the container bursts into flame. The original substance is a(an) ________, and the solid and gas produced are ________. A) mixture; elements B) compound; compounds C) compound; elements D) mixture; compounds E) element; compounds

C. Compound; elements

Consider the chemical reaction described as mercury(II) oxide heat mercury + oxygen. Identify the reactant(s) in this example. A) oxygen B) mercury + oxygen C) mercury(II) oxide D) heat E) mercury

C. Mercury (II) Oxide

Which of the following is a pure substance? A) eggs B) root beer C) neon D) bleach E) gasoline

C. Neon

The formula for ammonia, NH3, represents a compound composed of A) three atoms of nitrogen and one atom of hydrogen. B) one atom of nickel and three atoms of hydrogen. C) one atom of nitrogen and three atoms of hydrogen. D) three atoms of nitrogen and three atoms of hydrogen. E) one atom of nitrogen and three atoms of helium.

C. One atom of nitrogen and three atoms of hydrogen

The formula for glucose, C6H12O6, represents a compound composed of A) six atoms of carbon and two atoms of water. B) six atoms of carbon, ten atoms of hydrogen, and four atoms of oxygen. C) six atoms of carbon, twelve atoms of hydrogen, and six atoms of oxygen. D) six atoms of carbon and six atoms of water. E) one atom of carbon, two atoms of hydrogen, and one atom of oxygen.

C. Six atoms of carbon, twelve atoms of hydrogen, and six atoms of oxygen

Which of the following statements is true of specific gravity? A) Specific gravity is a measure of the reactivity index of a substance. B) It has the units of g/cm3. C) Specific gravity is unitless because it is the density of one substance divided by the density of water. D) Specific gravity is constant at any temperature.

C. Specific gravity is unit less because it is the density of one substance divided by the density of water

Which factor determines the state of matter in which a substance exists? A) color B) odor C) temperature D) amount E) density

C. Temperature

Which of the following is a physical change? A) the rusting of iron B) the baking of a potato C) the condensation of water vapor D) the explosion of nitroglycerin E) all of the above

C. The condensation of water vapor

Which choice best describes the degree of uncertainty in the measurement 4.0032 g? A) The uncertainty cannot be determined without additional information. B) The quantity is exact. C) The measurement is between 4.0031 and 4.0033 g. D) The measurement is between 3.99 and 4.01 g. E) The measurement is between 4.002 and 4.004 g

C. The measurement is between 4.0031 and 4.0033 g

The formula for sodium carbonate, Na2CO3, represents a compound composed of A) two atoms of sodium, three atoms of carbon, and three atoms of oxygen. B) two atoms of sodium and three atoms of carbonate. C) two atoms of sodium, one atom of carbon, and three atoms of oxygen. D) one atom of sodium and one atom of carbonate. E) six atoms of sodium, two atoms of carbon, and six atoms of oxygen.

C. Two atoms of sodium, one atom of carbon, and three atoms of oxygen

What is the symbol for tungsten? A) T u B) T i C) W D) Sn E) St

C. W

Barium sulfate is described as a white crystalline solid that melts at 1580°C and decomposes at 1600°C. At a temperature of 500°C, you would expect a sample of barium sulfate to be a? A) yellow liquid. B) white cloud of vapor. C) white crystalline solid. D) colorless liquid. E) form that cannot be determined.

C. White crystalline solid

A student weighed a solid sample. The units for this measurement are most likely to be recorded as A) grams per cubic centimeter. B) meters. C) grams. D) Kelvins. E) liters.

C. grams

What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length? Express this answer to the correct number of significant figures. A) 12 cm B) 11.69 cm C) 11.718 cm D) 11.72 cm E) 11.7 cm

D. 11.72 cm

How many calories are released when 500 g of water cools from 95.0°C to 25.0°C? A) 70.0 cal B) 35.0 cal C) 4.75 × 104 cal D) 3.50 × 104 cal E) 1.25 × 104 cal

D. 3.50 * 104

An analysis showed a sample to contain 0.00471 grams of lead. How many micrograms is this? A) 4.71 × 10-2 µg B) 0.471 µg C) 4.71 × 10-6 µg D) 4.71 × 103 µg E) 4.71 × 106 µg

D. 4.71 * 103ug

What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures. A) 3.722 cm B) 4.722 cm C) 7.722 cm D) 8 cm E) 7.7 cm

E. 7.7 cm

A 2.36 cm3 sample of an unknown metal weighs 18.5 g. What is the sample's density? A) 15.75 g/cm3 B) 0.784 g/cm3 C) 1.27 cm3/g D) 0.127 cm3/g E) 7.84 g/cm3

E. 7.84 g/cm3

A pure substance A) can be broken into its components by physical means. B) is chemically inert. C) is composed of more than one element. D) always has the same elemental composition. E) changes color when placed in bright sunlight.

D. Always has the same element composition

Which of the following is an indication that a chemical reaction has taken place? A) production of a gas B) formation of a solid C) change in color D) release of heat E) all of the above

E. All of the above

Caffeine, the active ingredient in coffee, is composed of eight atoms of carbon, ten atoms of hydrogen, and four atoms of nitrogen, and two atoms of oxygen. The chemical formula of caffeine is written A) CHNO B) C8H10N4O C) C8H12N4O4 D) C8H10N4O2 E) C8H10N4

D. C8H10N4O2

Which of the following is an example of matter? A) wisdom B) forgiveness C) jealousy D) clothing E) light

D. Clothing

Which of the following is a physical property? A) corrosiveness B) flammability C) inertness D) conductivity E) ability to support combustion

D. Conductivity

Which of the following numbers contains four significant figures? A) 0.23010 B) 230,110 C) 23,011.0 D) 0.0230100 E) 0.002301

E. 0.002301

What is the density of a 6.0 × 102 mL liquid sample that weighs 450 g? A) 1.33 g/mL B) 1050 g/mL C) 0.37 g/mL D) 270 g/mL E) 0.75 g/mL

E. 0.75 g/mL

A 35.0 mL sample of a liquid weighs 27.2 g. What is the density of the liquid? A) 7.80 g/mL B) 62.2 g/mL C) 0.952 g/mL D) 1.29 g/mL E) 0.777 g/mL

E. 0.777 g/mL

A chemist is given an unknown gas sample. Which observation describes a chemical property of the sample? A) It has a sharp, stinging odor. B) It is colorless. C) It weighs 11.2 grams. D) It extinguishes a glowing splint. E) Its density is greater than that of air.

D. It extinguishes a glowing splint

In scientific notation, the number 185,000,000 is A) 185 × 106. B) 1.85 × 10-8. C) 185 × 10-8. D) 1.85 × 106. E) 1.85 × 108.

E. 1.85 * 108

When the prefix milli is used in the metric or SI system, a fundamental unit of measurement is multiplied by what factor? A) 10-2 B) 10-6 C) 103 D) 106 E) 10-3

E. 10-3

How many meters are there in one kilometer? A) 10-2 B) 106 C) 10-6 D) 10-3 E) 103

E. 103

Which is an example of matter? A) conductivity B) electrical current C) reactivity D) plastic E) anxiety

D. Plastic

What is the specific gravity of a liquid sample with a mass of 35.0 g and a volume of 14.00 mL? A) 21.0 B) 14.0 C) 2.50 g/mL D) 14.0 g/mL E) 2.50

E. 2.50

The conversion factor used to convert 15.0 inches to cm is A) 1 cm 100 mm . B) 2.54 in 1 cm . C) 1 in 2.54 cm . D) 1 cm 2.54 in . E) 2.54 cm 1 in .

E. 2.54 cm 1 in

Of the elements listed, the most abundant by mass percent in the earth's crust is A) iron. B) sodium. C) aluminum. D) silicon. E) hydrogen.

D. Silicon

95.0°F is the same as A) 203°C. B) 21.0°C. C) 85.0°C. D) 171°C. E) 35.0°C.

E. 35.0 C

How many pounds are contained in 84.0 kg? A) 380 lb B) 0.038 lb C) 38.0 lb D) 0.084 lb E) 185 lb

E. 380 lb

Which of the following are states of matter? A) precipitate B) solution C) suspension D) solid E) all of the above

D. Solid

Which best describes the size and shape of a sample of gas? A) It has definite volume and definite shape. B) Volume and shape cannot be described. C) Its volume is determined by the container, but it has a definite shape. D) Volume and shape are both determined by the container. E) It has definite volume, but shape is determined by the container.

D. Volume and shape are both determined by the container

Which statement describes a physical change? A) burning the morning toast B) digesting your lunch C) turning on a flashlight D) winding an alarm clock E) lighting a match

D. Winding an alarm clock

The abbreviation for the metric unit used to measure mass is A) g/cm3 B) L C) K D) g E) m

D. g

The SI unit for volume is ________ and the metric unit for volume is ________. A) mL; cc B) L; m3 C) cc; L D) m3; L E) m3; cm3

D. m3; L

The units most likely to be used to measure the amount of alcohol to be added to a small test tube are A) g. B) L. C) kg. D) mL. E) cm.

D. mL

Which term does not describe a conversion between states of matter? A) condensation B) melting C) freezing D) mixing E) evaporation

D. mixing