Chem Chapter 2 Study Guide

True or false A pound of feathers really does not weigh more than a pound of gold.

true

true or false 0 K is equal to -273 °C.

true

true or false A substance that may be a good heat conductor USUALLY has a low value for specific heat.

true

true or false One mL is equal to 1 cc

true

true or false The commonly quoted distance from the earth to the sun (93,000,000 miles) is accurate to only +/- 1,000,000 miles.

true

true or false The fact that ice has a lower density than liquid water is advantageous to marine life

true

true or false The prefix micro- indicates one millionth.

true

true or false There are 1 million micrometers in 1 meter.

true

true or false When adding or subtracting measured numbers, the result can be no more certain than the least number being added or subtracted.

true

true or false When determining the number of significant figures in a number, leading zeros are not significant.

true

true or false When heat is absorbed the temperature of the system increases.

true

true or false 1 kilowatt is equal to 10,000 watts.

false

true or false 40 °C is equivalent to 40 °F.

false

true or false Ice always occupies a smaller volume than water.

false

true or false Oil "floats" on water because oil weighs less than water.

false

true or false Precision refers to how close the measured result is to the true value.

false

true or false There are 4 pints in a gallon.

false

true or false Water is a good heat conductor.

false

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) 5.1 min C) 1.6 min D) 8.2 min

8.2 min

0 Fahrenheit A) -17.7 °C B) -40 °F C) 0 °C D) 98.6 °F E) 277 K

A) -17.7 Celsius

Which of the following correctly expresses (in normal decimal notation) the number 1.06 × 10-4? A) 0.000106 B) 10,600 C) 106 D) 0.0106

A) 0.000106

one degree Fahrenheit is equal to ____ Celsius A) 0.556 B) 16 C) 2.54 D) 4.18 E) 454

A) 0.556 celsius

The correct scientific notation for 147.8 × 10-3 is ________. A) 1.478 × 10-1 B) 1478 × 10-4 C) 1.478 × 10-5 D) 1.478

A) 1.478x10^-1

Which of the following correctly converts 0.000001546 mi in scientific notation? A) 1.546 × 10-6 mi B) 1.546 × 106 mi C) 1.546 × 10-5 mi D) 1.546 × 105 mi

A) 1.546x10^-6

10 millimeters are equal to ________ nanometers. A) 107 B) 103 C) 10-3 D) 10-7

A) 10^7

Using the rules of significant figures, calculate the following: 14.8903 - 2.14 = A) 12.75 B) 12 C) 12.750 D) 13 E) 12.7503

A) 12.75

Which of the following is the shortest? A) 18 inches B) 1.9 ft C) 580 mm D) 0.58 m

A) 18 inches

5 gallons is equal to ________ quarts. A) 20 B) 10 C) 5 D) 40

A) 20

0.00213 A) 3 B) 5 C) 2 D) 1

A) 3

How many cm2 are there in 5.20 in2 ? A) 33.5 B) 13.2 C) 0.806 D) 2.05

A) 33.5

one yard has ___inches A) 36 B) 1 C) 8

A) 36 inches

How many kilograms are in 452 mg? A) 4.52 × 10-4 kg B) 0.452 kg C) 4.52 × 10-7 kg D) 4.52 × 108 kg

A) 4.52x10^-4 kg

465.000 g is equivalent to ________. A) 465,000 mg B) 0.0465 kg C) 465,000 ng D) 4.65 kg

A) 465,000 mg

One thousand yards are equivalent to ________. A) 9.14 × 102 m B) 9.14 × 10-2 mm C) 1,094 m D) 12,000 in

A) 9.14x10^2m

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

A) A and B may be the same metal, but more studies are needed to decide if they are the same

Which piece of glassware provides the least precise volume measurement of a liquid? A) beaker B) pipette C) buret D) graduated cylinder

A) Beaker

Which of the following does not measure temperature? A) J B) K C) °C D) °F

A) J

Which is an exact number? A) a number of coins B) the mass of a coin C) the radius of a coin D) the diameter of a coin

A) a number of coins

Which is the SI unit for temperature? A) Kelvin B) Celsius C) Fahrenheit D) either A or C

A) kelvin

Which is the SI unit for mass? A) kilogram B) ounce C) gram D) pound

A) kilogram

Copper's density is about 8.96 g/mL. This means that a certain mass of copper will ________. A) occupy a volume that is 8.96 times smaller than the volume occupied by the same mass of water B) occupy a volume 8.96 times larger than the volume occupied by the same mass of water C) always occupy a volume of 8.96 mL D) occupy the same volume as the same mass of water

A) occupy a volume that is 8.96 times smaller than the volume occupied by the same mass of water

Which of the following is not an SI unit that is used in chemistry? A) quart B) s C) kg D) K

A) quart

-40 Celsius A) -17.7 °C B) -40 °F C) 0 °C D) 98.6 °F E) 277 K

B) -40 Fahrenhiet

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) 0.16 B) 0.10 C) 0.40 D) 0.05

B) 0.10

one kelvin is equal to ____celsius A) 36 B) 1 C) 8

B) 1 celsius

How many Joules are in 250.0 kcal? A) 1.046 × 103 J B) 1.046 × 106 J C) 5.975 × 104 J D) 250.0 J

B) 1.046x10^6

The correct answer for the operation (5.61 + 7.891 ) / 9.1 is ________. A) 5.0 B) 1.5 C) 4.86 D) 4.8646714

B) 1.5

one pound is equal to ____oz A) 0.556 B) 16 C) 2.54 D) 4.18 E) 454

B) 16oz

If the density of steel is 2.7 g/ cm3, the mass of 10.0 cm3 of this material is ________. A) 0.270 g B) 27.0 g C) 3.70 g D) 2.70 g

B) 27.0

How many significant figures are there in 0.00123, 7000, and 1.519 × 10-2? A) 4, 1, 1 B) 3, 1, 4 C) 6, 4, 4 D) 7, 1, 4

B) 3,1,4

5.2406 A) 3 B) 5 C) 2 D) 1

B) 5

) Which is a derived SI unit? A) s B) J C) K D) m

B) J

For the measured value 6.73 pounds, what is the degree of uncertainty? A) +/- 0.1 pound B) +/- 0.01 pound C) +/- 10 pounds D) +/- 1 pound

B)+/-0.01 pound

How many moles of copper are there in 128 grams of copper (for copper, 1 mole = 63.546 grams)? A) 8.13 × 10-3 moles B) 2.01 moles C) 8.13 × 10-3 moles D) 0.496 moles

B)2.01 moles

The equivalent of 68 °F is ________. A) 25 °C B) 20 °C C) 32 °C D) 37 °C

B)20

The closest number of grams that is equivalent to 0.745 lb is ________. A) 3.379 B) 338 C) 0.338 D) 1.64 × 10-3

B)338

Round off 907,506 to four significant figures. A) 908,000 B) 9.075 × 105 C) 9.075 × 10-5 D) 9,075 E) 90,751

B)9.075x10x^5

If the speed limit is 60 mi/hr, its equivalent in km/hr is ________. A) 27 B) 97 C) 123 D) 38

B)97

Which of the following temperatures are not possible? A) -425 °F B) 5 K C) -425 °C D) 2000 °C

C) -425

273 K A) -17.7 °C B) -40 °F C) 0 °C D) 98.6 °F E) 277 K

C) 0 celsius

one inch equals ____cm A) 0.556 B) 16 C) 2.54 D) 4.18 E) 454

C) 2.54cm

Which of the following numbers expresses the value 2600. calories (an exact measurement) with both the correct units and proper scientific notation? A) 2.60 × 103 mcal B) 26 × 102 dcal C) 2.600 × 103 cal D) 2.6 × 104 kcal

C) 2.600x10^3

A liquid boils at 68 °F at one atmosphere pressure. This is equal to ________ K. A) 253 B) 341 C) 293 D) 205

C) 293

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) 25 °C B) 50 °C C) 70 °C D) 22.5 °C

C) 70

one gallon has ____pints A) 36 B) 1 C) 8

C) 8 pints

Which of the following is the hottest temperature? A) 104 °F B) 353 K C) 90 °C D) All of the above are the same

C) 90

Which of the following is a conversion factor? A) volume B) mass C) density D) time

C) density

What is the prefix for the multiplier 1 × 106? A) nano- B) micro- C) mega- D) kilo-

C) mega-

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

C) the U.S. national debt is 6 trillion dollars

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) 0.0080 g/mL C) 0.12 g/mL D) 8.5 g/mL

C)0.12 g/mL

When 20.5 grams is divided by 15 mL, the correct answer should be reported as ________. A) 1.36 g/mL B) 1 g/mL C) 1.4 g/mL D) 1.3 g/mL

C)1.4g/mL

4.0 A) 3 B) 5 C) 2 D) 1

C)2

40 °C is equal to ________ K. A) 263 B) 233 C) 313 D) 293

C)313

How many significant digits are there in the number 0.02560? A) 3 B) 6 C) 4 D) 5

C)4

0.02 A) 3 B) 5 C) 2 D) 1

D) 1

0.7 A) 3 B) 5 C) 2 D) 1

D) 1

5000 A) 3 B) 5 C) 2 D) 1

D) 1

In order to convert 121 dm to mm one needs to multiply by ________. A) 10-2 B) 10-5 C) 107 D) 102

D) 10^2

A person is 6 ft 10 in tall. This is equivalent to ________ m. A) 2.69 m B) 1.68 m C) 3.22 m D) 2.08 m

D) 2.08 m

one cal is equal to ____ J A) 0.556 B) 16 C) 2.54 D) 4.18 E) 454

D) 4.18 J

How many significant figures are in 43.8001? A) 4 B) 3 C) 2 D) 6

D) 6

The dietary energy requirement for an adult is 2000 kcal per day. This is equivalent to ________. A) 478 J B) 47.8 kJ C) 8.37 J D) 8.37 × 103 k J

D) 8.37x10^3 kJ

310 K A) -17.7 °C B) -40 °F C) 0 °C D) 98.6 °F E) 277 K

D) 98.6 Fahrenheit

Which of the following operations will give an answer of 50.1? A) 26.255 × 1.91 B) 58.23 - 8.1 C) 29.75 + 20.3 D) all of the above

D) all of the above

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

D) all of the above are true

The units of density for a liquid are usually expressed as ________. A) mg/mL B) g/L C) mg/L D) g/mL

D) g/mL

Which is the SI unit for length? A) mile B) inch C) kilometer D) meter

D) meter

The prefix used to indicate 10-12 is ________. A) micro- B) nano- C) giga- D) pico-

D) pico-

Which is the SI unit for time? A) minute B) year C) day D) second

D) second

40 Fahrenheit A) -17.7 °C B) -40 °F C) 0 °C D) 98.6 °F E) 277 K

E) 277 K

one pound is equal to ____g A) 0.556 B) 16 C) 2.54 D) 4.18 E) 454

454 g