Deck 2: The Numerical Side of Chemistry

Question 1

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

Answer 1

9.075 × 10⁵

Question 2

Express the number 1.06 × 10^-4 in standard notation.

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

Answer 2

0.000106

Question 3

Convert 0.000001546 mi to scientific notation.

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

Answer 3

1.546 × 10^-6 mi

Question 4

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 5

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 6

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 7

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 8

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 9

How many significant figures are in 43.8001?

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

Question 10

The number 0.0040600 has ________ trailing zeros.

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

Question 11

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

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

Question 12

Identify the piece of glassware that provides the least precise volume measurement of a liquid.

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

Question 13

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

Question 14

How many significant digits are present in the number 0.02560?

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

Question 15

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 16

The number 0.00003007 expressed in scientific notation is ________.

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

Question 17

How many significant figures are present 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 18

The number 0.0247 expressed in scientific notation is ________.

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

Question 19

Identify the 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

Question 20

How many significant digits are present n the number 6046.2?

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

Question 21

What is the prefix for the multiplier 1 × 10⁶?

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

Question 22

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 23

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 24

Which is a derived SI unit?

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

Question 25

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

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

Question 26

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

Question 27

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

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

Question 28

10 millimeters are equal to ________ nanometers.

A) 10⁷
B) 10^-7
C) 10³
D) 10^-3

Question 29

Which is the SI unit for temperature?

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

Question 30

Which is the SI unit for time?

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

Question 31

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

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

Question 32

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

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

Question 33

How many kilograms are in 452 mg?

A) 4.52 × 10^-7 kg
B) 4.52 × 10^-4 kg
C) 0.452 kg
D) 4.52 × 10⁸ kg

Question 34

Which of the following numbers expresses the value 2600. calories 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 35

Which is the SI unit for length?

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

Question 36

Which is not a derived SI unit?

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

Question 37

Which is the SI unit for mass?

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

Question 38

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 39

465.000 g is equivalent to ________.

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

Question 40

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

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

Question 41

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

A) 10⁷
B) 10²
C) 10^-2
D) 10^-5

Question 42

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 43

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 44

If the density of aluminum is 2.70 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 45

Which of the following does not measure temperature?

A) °C
B) °F
C) K
D) J

Question 46

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 47

Which of the following temperatures are not possible?

A) 2000 °C
B) -425 °F
C) -425 °C
D) 5 K

Question 48

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 49

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 50

20.5 g of a liquid has a volume of 15 mL. What is the density?

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

Question 51

164.0 g of a substance occupy a volume of 120.0 mL. In relation to water, which statement is true?

A) The substance will float in water.
B) The substance will sink in water.
C) The substance will react with water.
D) The substance is a metal.

Question 52

Which is the lowest temperature?

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

Question 53

68 °F is equal to ________.

A) 37 °C
B) 32 °C
C) 25 °C
D) 20. °C

Question 54

Ethanol has a density of 0.789 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 55

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

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

Question 56

40. °C is equal to ________ K.

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

Question 57

The density of copper 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 58

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

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

Question 59

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 60

The correct order of decreasing 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 61

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

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

Question 62

20.9 kJ is equal to ________ kcal.

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

Question 63

How many cm² are there in 5.20 iN₂?

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

Question 64

Convert 250.0 kcal to Joules.

A) 250.0 J
B) 5.975 × 10⁴ J
C) 1.046 × 10⁶ J
D) 1.046 × 10³ J

Question 65

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 66

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 67

Which of the following has the greatest mass?

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

Question 68

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

A) 0.496 moles
B) 8134 moles
C) 8.13 × 10^-3 moles
D) 2.01 moles

Question 69

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

Question 70

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

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

Question 71

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

A) 660
B) 2,640
C) 7.92 × 10³
D) 73.3

Question 72

Which of the following is the shortest?

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

Question 73

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) 0.050
B) 0.10
C) 0.16
D) 0.40

Question 74

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 75

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 76

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 77

5 gallons is equal to ________ quarts.

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

Question 78

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 79

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

A) 2.7 × 10⁴
B) 2.7
C) 0.27
D) 2.7 × 10³

Question 80

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