Deck 2: The Numerical Side of Chemistry

Question 1

The correct answer for the operation (5.61 + 7.891 )/ 9.1 is ________.

A)4.86
B)4.8646714
C)1.5
D)5.0

Answer 1

1.5

Question 2

The closest number of grams that is equivalent to 0.745 lb is ________.

A)338
B)3.379
C)0.338
D)1.64 × 10^-3

Answer 2

338

Question 3

Which is an exact number?

A)a number of coins
B)the diameter of a coin
C)the radius of a coin
D)the mass of a coin

Answer 3

a number of coins

Question 4

How many significant figures are there in 0.00123, 7000, and 1.519 × 10^-2?

A)6, 4, 4
B)4, 1, 1
C)7, 1, 4
D)3, 1, 4

Question 5

Which of the following represents an estimated measurement?

A)A calendar week has 7 days.
B)The U.S. national debt is 6 trillion dollars.
C)There are 50 states in the United States of America.
D)My bank account contains 19 dollars and 26 cents.

Question 6

The units of density for a liquid are usually expressed as ________.

A)g/mL
B)g/L
C)mg/mL
D)mg/L

Question 7

Which value below properly expresses the number 0.0247 in scientific notation?

A)2.47 × 10^-4
B)2.47 × 10^-2
C)2.47 × 10^-1
D)24.7

Question 8

One thousand yards are equivalent to ________.

A)9.14 × 10^-2 mm
B)9.14 × 10² m
C)12,000 in
D)1,094 m

Question 9

How many significant figures are in 43.8001?

A)2
B)3
C)4
D)6

Question 10

The correct scientific notation for 147.8 × 10^-3 is ________.

A)1.478
B)1478 × 10^-4
C)1.478 × 10^-1
D)1.478 × 10^-5

Question 11

How many significant digits are there in the number 6046.2?

A)4
B)3
C)5
D)1

Question 12

Which of the following correctly expresses (in normal decimal notation)the number 1.06 × 10^-4?

A)10,600
B)106
C)0.0106
D)0.000106

Question 13

Which piece of glassware provides the least precise volume measurement of a liquid?

A)beaker
B)graduated cylinder
C)buret
D)pipette

Question 14

For the measured value 6.73 pounds, what is the degree of uncertainty?

A)+/- 10 pounds
B)+/- 1 pound
C)+/- 0.1 pound
D)+/- 0.01 pound

Question 15

Which one of the following numbers does not have exactly 4 significant figures?

A)1.007 g
B)0.0007 g
C)1.070 g
D)1700. g
E)1.700 g

Question 16

The prefix used to indicate 10^-12 is ________.

A)micro-
B)nano-
C)pico-
D)giga-

Question 17

Using the rules of significant figures, calculate the following: 14.8903 - 2.14 =

A)12.750
B)12.75
C)13
D)12.7503
E)12

Question 18

The number 0.00003007 expressed in exponential notation is ________.

A)3.007 × 10^-5
B)3.007 × 10⁵
C)3.007
D)3.007 × 10⁴
E)3.7 × 10^-5

Question 19

Which of the following correctly converts 0.000001546 mi in scientific notation?

A)1.546 × 10⁶ mi
B)1.546 × 10⁵ mi
C)1.546 × 10^-5 mi
D)1.546 × 10^-6 mi

Question 20

Round off 907,506 to four significant figures.

A)9.075 × 10^-5
B)9.075 × 10⁵
C)9,075
D)90,751
E)908,000

Question 21

How many significant digits are there in the number 0.02560?

A)3
B)4
C)5
D)6

Question 22

The correct answer in the operation below is ________. (30.004 cm × 14.01 g)/ 6.08 cm²

A)69.1375 g/cm
B)69.14 g/cm
C)69.1 g/cm
D)69.138 g/cm

Question 23

Which of the following numbers expresses the value 2600. calories (an exact measurement)with both the correct units and proper scientific notation?

A)2.6 × 10⁴ kcal
B)2.600 × 10³ cal
C)2.60 × 10³ mcal
D)26 × 10² dcal

Question 24

For the final sum of 544.36 + 455.64, the number of significant figures is ________.

A)6
B)5
C)4
D)2
E)1

Question 25

When 20.5 grams is divided by 15 mL, the correct answer should be reported as ________.

A)1 g/mL
B)1.3 g/mL
C)1.4 g/mL
D)1.36 g/mL

Question 26

Which of the following is defined as the amount of material in a sample that is independent of where it is measured?

A)weight
B)mass
C)volume
D)both A and B

Question 27

If the speed limit is 60 mi/hr, its equivalent in km/hr is ________.

A)38
B)97
C)27
D)123

Question 28

What is the prefix for the multiplier 1 × 10^-6?

A)micro-
B)nano-
C)mega-
D)kilo-

Question 29

Which of the following does not measure temperature?

A)°C
B)°F
C)K
D)J

Question 30

40 °C is equal to ________ K.

A)313
B)293
C)263
D)233

Question 31

How many moles of copper are there in 128 grams of copper (for copper, 1 mole = 63.546 grams)?

A)0.496 moles
B)8.13 × 10^-3 moles
C) 8.13 × 10^-3 Moles
D)2.01 moles

Question 32

If the speed limit is 120 km/hr, its equivalent in mi/hr is ________.

A)75
B)192
C)133
D)210

Question 33

Which of the following is not an SI unit that is used in chemistry?

A)s
B)K
C)kg
D)quart

Question 34

What is the prefix for the multiplier 1 × 10⁶?

A)micro-
B)nano-
C)mega-
D)kilo-

Question 35

The equivalent of 68 °F is ________.

A)37 °C
B)32 °C
C)25 °C
D)20 °C

Question 36

465.000 g is equivalent to ________.

A)0.0465 kg
B)465,000 mg
C)4.65 kg
D)465,000 ng

Question 37

The United States has the unit of currency dollars (unit symbol: $). Which of the following is a proper expression of the value seventy seven hundred dollars +/- 1 dollar?

A)$ 7.7 × 10^-4
B)$ 7.7 × 10^-3
C)$ 7700
D)$ 7.700 × 10^-3

Question 38

In order to convert 121 dm to mm one needs to multiply by ________.

A)10⁷
B)10²
C)10^-2
D)10^-5

Question 39

The dietary energy requirement for an adult is 2000 kcal per day. This is equivalent to ________.

A)478 J
B)8.37 J
C)47.8 kJ
D)8.37 × 10³ kJ

Question 40

What is the density of a piece of wood that weighs 62 grams and displaces 0.525 L of water?

A)120 g/mL
B)0.12 g/mL
C)0.0080 g/mL
D)8.5 g/mL

Question 41

A person is 6 ft 10 in tall. This is equivalent to ________ m.

A)2.08 m
B)2.69 m
C)3.22 m
D)1.68 m

Question 42

Ethanol has a density that is bout 0.8 g/mL. This means that a certain volume of ethanol will ________.

A)weigh more than an equal volume of water
B)weigh less than an equal volume of water
C)weigh exactly the same as an equal volume of water
D)always weigh 0.8 g

Question 43

The density of a 4.0 cm³ sample of a metal is 11.3 g/cm³. What is the density of 8.0 cm³ sample of the same metal?

A)11.3 g/ mL
B)22.6 g/ mL
C)5.65 g/ mL
D)2.0 g/ mL

Question 44

A popular science demonstration is to take several liquids that will not mix together and "stack" these liquids in a tall glass cylinder. Suppose the following three liquids were placed in the same tall, narrow glass cylinder: The substance that should be placed first in the cylinder so that it is on the bottom is ________.

A)vinegar
B)motor oil
C)corn syrup
D)cannot be determined

Question 45

The sum for the operation 1.2315 + 0.116 + 15.10 is ________.

A)16
B)16.4
C)16.45
D)16.4475

Question 46

Which of the following is the hottest temperature?

A)90 °C
B)104 °F
C)353 K
D)All of the above are the same.

Question 47

Copper's density is about 8.96 g/mL. This means that a certain mass of copper will ________.

A)occupy the same volume as the same mass of water
B)occupy a volume 8.96 times larger than the volume occupied by the same mass of water
C)occupy a volume that is 8.96 times smaller than the volume occupied by the same mass of water
D)always occupy a volume of 8.96 mL

Question 48

Which of the following is coldest temperature?

A)-40 °C
B)-40 °F
C)210 K
D)All of the above are the same.

Question 49

Which of the following is the shortest?

A)18 inches
B)0.58 m
C)580 mm
D)1.9 ft

Question 50

20.9 kJ is equal to ________ kcal.

A)5,000
B)5.00
C)873.6
D)20

Question 51

Which is the lowest temperature?

A)40 °C
B)104 °F
C)313 K
D)All of them are about the same.

Question 52

A liquid boils at 68 °F at one atmosphere pressure. This is equal to ________ K.

A)341
B)205
C)253
D)293

Question 53

Which of the following has the lightest mass?

A)4.4 lb
B)2.0 kg
C)165 oz
D)2.0 × 10³ g

Question 54

The world record for the 100-meter dash is 9.8 s. If the world record holding runner could maintain the same pace when running five kilometers, he would cover the distance in ________.

A)9.8 min
B)8.2 min
C)1.6 min
D)5.1 min

Question 55

If the density of steel is 2.7 g/ cm³, the mass of 10.0 cm³ of this material is ________.

A)27.0 g
B)2.70 g
C)3.70 g
D)0.270 g

Question 56

The density of aluminum is 2.7 g/. This is equivalent to ________ kg/m³.

A)2.7 × 10⁴
B)2.7
C)0.27
D)2.7 × 10³

Question 57

Which statement is true?

A)1 mm = 0.0394 in.
B)1 cm³ = 1 mL
C)1 g = 0.0022 lb
D)All of the above are true.

Question 58

The correct order of increasing temperatures in the set below is ________.

A)18 °C > 80 °F > 280 K
B)280 K > 18 °C > 80 °F
C)80 °F > 18 °C > 280 K
D)80 °F > 280 K > 18 °C

Question 59

How many cm² are there in 5.20 in² ?

A)33.5
B)13.2
C)2.05
D)0.806

Question 60

The distance of the 220-yard race is equivalent to ________ ft.

A)660
B)2,640
C)7.92 × 10³
D)73.3

Question 61

10 g of a certain metal absorb 40 cal of heat and the temperature is observed to rise from 20 °C to 60 °C. The specific heat of this metal is ________ cal/g °C.

A)0.05
B)0.10
C)0.16
D)0.40

Question 62

100 cal of heat are added to 10 g of ethanol (0.581 cal/g °C)originally at 15 °C. The final temperature is ________.

A)17 °C
B)27 °C
C)32 °C
D)38 °C

Question 63

By how many places must the decimal point of the number 0.0000814 be moved in order to express this same number in a standard scientific notation?

A)4
B)5
C)6
D)7

Question 64

Which of the following is a conversion factor?

A)mass
B)density
C)volume
D)time

Question 65

An 80.0 g sample of metal A displaces 20.0 mL of water, while a 56.0 g sample of metal B displaces 14.0 mL of water. The conclusion one may draw from this information is that ________.

A)A and B are the same metal
B)A and B are not the same metal
C)A and B may be the same metal, but more studies are needed to decide if they are the same
D)The above results tell us nothing about the nature of A and B.

Question 66

The number 0.0040600 has ________ trailing zeros.

A)0
B)1
C)2
D)6

Question 67

Which is the SI unit for temperature?

A)Fahrenheit
B)Celsius
C)Kelvin
D)either A or C

Question 68

Which of the following operations will give an answer of 50.1?

A)29.75 + 20.3
B)58.23 - 8.1
C)26.255 × 1.91
D)all of the above

Question 69

Which of the following statements about energy is correct?

A)Energy is the ability to do work.
B)When energy is absorbed by a system, its temperature increases.
C)Heat energy may be converted to work.
D)All of the above are correct.

Question 70

Which is the SI unit for mass?

A)kilogram
B)pound
C)gram
D)ounce

Question 71

Which is not a derived SI unit?

A)Pa
B)J
C)C
D)s

Question 72

5 gallons is equal to ________ quarts.

A)5
B)10
C)20
D)40

Question 73

Which is a derived SI unit?

A)J
B)m
C)K
D)s

Question 74

Which of the following is not a conversion factor?

A)speed
B)density
C)energy
D)specific heat

Question 75

The specific heat of water is higher than that of iron. Which of the following statements is correct?

A)The energy needed to heat iron to a certain temperature is less than the energy needed to raise the water temperature to the same level.
B)If the same quantity of energy is applied to both water and iron, iron's temperature will be much higher.
C)Iron is a better heat conductor.
D)All of the above statements are correct.

Question 76

500 cal are added to 10 g of water (specific heat of 1.000 cal/g °C)originally at 20 °C. The final temperature is ________.

A)70 °C
B)50 °C
C)25 °C
D)22.5 °C

Question 77

Which is the SI unit for time?

A)year
B)day
C)minute
D)second

Question 78

164.0 g of a substance occupy a volume of 120.0 mL. One can say ________.

A)that the substance will float
B)the substance will not float
C)the substance will react with water
D)the substance is a metal

Question 79

Which is the SI unit for length?

A)meter
B)inch
C)kilometer
D)mile

Question 80

Which of the following operations will not give an answer of 73.3?

A)63.75 × 1.15
B)90.0 - 16.67
C)60.15 + 13.26
D)12.161 × 6.03