Chem 101 ch. 2

Given that 1 inch equals 2.54 centimeters, then 1 cubic inch equals 16.387 cubic centimeters

True

How many cm3 are there in 1.25 ft3? A) 38.1 B) 5.49 × 103 C) 246 D) 3.54 × 104 E) none of the above

D

What is the base SI unit for mass? A) kilogram B) gram C) pound D) ton E) none of the above

A

When the value 4.449 is rounded to two significant figures, the number should be reported as: A) 4.4 B) 4.5 C) 4.44 D) 4.45 E) none of the above

A

Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves melt? Densities (g/mL): lead = 11.4, glass = 2.6, gold = 19.3, charcoal = 0.57, platinum = 21.4. A) gold and platinum B) glass and charcoal C) gold, platinum, glass and coal D) gold and charcoal E) none of the above

B

The correct number of significant figures in the number is: A) 3 B) 4 C) 5 D) ambiguous E) none of the above

B

The number 0.010100 has five significant figures

True

The number 7.20 × 103 contains three significant figures.

True

The prefix in the name of a polygon indicates how many sides this geometric figure has, so a "decagon" would have ten sides

True

The prefix nano represents the multiplier 0.000000001

True

Trailing zeros at the end of a number, but before an implied decimal point, are ambiguous

True

The correct prefix for the multiplier 1,000,000,000 is: A) mega. B) milli. C) tera. D) giga. E) none of the above

D

An object weighing 1.840 kg has a volume of 0.0015 m3. What is the density of the object in g/cm3? A) 1.2 B) 0.0012 C) 0.82 D) 0.0028 E) none of the above

A

Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with the dimensions of 10.0 in × 4.00 in × 3.00 in. A) 3.80 × 104 B) 102 C) 2.32 × 103 D) 0.161 E) none of the above

A

How many cm3 are there in 2.5 m3? A) 2.5 × 106 B) 2.5 × 10-2 C) 2.5 × 102 D) 2.5 × 10-6 E) none of the above

A

A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the ball? A) 0.207 mL B) 0.207 L C) 4.82 mL D) 4.82 L E) none of the above

C

Determine the answer for the equation below with correct number of significant figures: 1.2 × 1.79 = A) 2.148 B) 2.15 C) 2.1 D) 2.2 E) none of the above

C

The correct prefix for the multiplier 0.000001 is: A) mega. B) milli. C) micro. D) nano. E) none of the above

C

How many inches are in 25.8 cm? A) 0.10 B) 28.3 C) 0.0984 D) 10.2 E) none of the above

D

How many microliters are in 41.0 mL? A) 4.1 × 103 B) 4.1 × 1010 C) 0.041 D) 4.10 × 104 E) none of the above

D

In the number 48.93, which digit is estimated? A) 4 B) 8 C) 9 D) 3 E) None of the above, all digits are certain

D

A solution map is the section near the back of the textbook that provides the answers to assigned problems.

False

If you count 7 pennies, you can only report one significant figure in that measurement

False

If you know the density of a liquid and its volume, the mass of the liquid may be calculated using the equation: m = V/d.

False

The mass of an object depends on gravity

False

A conversion factor is a fraction with one unit on top and a different unit on the bottom

True

A solution map diagrams the steps required to get from the starting point to the end point of a calculation problem

True

Conversion factors are constructed from any two quantities known to be equivalent

True

The correct decimal representation of 1.201 × 10-7 is: A) 12010000 B) 0.0001201 C) 0.0000001201 D) 1201.000 E) none of the above

C

What is the volume of a cube with dimensions 11.0 cm × 11.0 cm × 11.0 cm in m3? A) 1.331 × 10-3 B) 1.33 × 103 C) 1.33 × 10-3 D) 1.3 × 103 E) none of the above

C

The correct multiplier for the prefix pico is: A) 10-3 B) 10-6 C) 10-9 D) 10-12 E) none of the above

D

How many milliliters are in 17.5 L? A) 175 B) 1.75 × 10-2 C) 1.75 × 103 D) 1.75 × 104 E) none of the above Answer: D

D

If you are given the mass and density of an object, you can calculate the volume by using the equation: V = m/d.

True

All solids have the same density

False

A room has dimensions of 10.0 ft × 20.0 ft × 8.00 ft. Given that there are three feet in a yard, what is the volume of the room in yd3? A) 178 B) 59.3 C) 1.60 × 103 D) 533 E) none of the above

B

Determine the answer to the following equation with correct number of significant figures: (17.103 + 2.03) × 1.02521 = A) 19.6153 B) 19.62 C) 19.6 D) 20 E) none of the above

B

The correct number of significant figures in the number 0.027090 is: A) 7 B) 6 C) 5 D) ambiguous E) none of the above

C

The correct scientific notation for the number 500.0 is: A) 5 × 102 B) 5.00 × 102 C) 5.000 × 102 D) 5 × 10-2 E) none of the above

C

The wavelength of blue light is 0.00000045 m. Express this wavelength in scientific notation. A) 4.5 × 10-6 m B) 4.5 × 10^6 m C) 4.5 × 10 -7 m D) 4.5 × 10^7 m E) 0.45 × 10-7 m

C

The base unit of length in the SI system is the cm.

False

There are 1000 kilometers in one meter.

False

Zeros located between two numbers are not significant.

False

The correct prefix for the multiplier 1,000,000 is: A) mega. B) milli. C) micro. D) nano. E) none of the above

A

Which of the following statements is NOT part of the rules for determining significant figures? A) Non-zero digits at the end of a number are not significant. B) Zeroes between two numbers are significant. C) Zeroes to the left of the first non-zero number are not significant. D) Trailing zeroes at the end of a number, but before an implied decimal point are ambiguous. E) All of the above statements are part of the rules.

A

A 12-oz can of soda pop costs eighty-nine cents. A 2.00 L bottle of the same variety of soda pop costs $2.29. How many times more expensive it is to buy the 12-oz can of pop compared to buying it in a 2.00 L bottle? (1.00 L = 1.057 quart and 1 quart contains 32 oz) A) 1.9 B) 2.2 C) 2.6 D) 2.8 E) 4.2

B

Determine the answer for the equation below with correct number of significant figures: 3.215 × 13.2 ÷ 0.218 = A) 194.669 B) 195 C) 194.7 D) 194.67 E) none of the above

B

One mile measures 5,280 feet long, so one square mile is equivalent to 5,280 square feet.

False

A nine gigagram mass is heavier than a nine nanogram mass.

True

How many low dose 81 mg aspirin tablets can be made from 1.21 kg of aspirin? A) 1.5 × 10^3 tablets B) 1.5 × 10^4 tablets C) 1.5 × 10^5 tablets D) 1.21 ×10^3 tablets E) 1.21 × 10^4 tablets

B

Suppose a boat engine leaks 938 milliliters of oil into a lake. The mass of this spilled oil is 823 The oil will not mix with the lake water. Which statement is true? A) The oil will sink because its density of 0.877 g/mL is greater than the density of water. B) The oil will float because its density of 0.877 g/mL is less than the density of water. C) The oil will sink because its density of 1.14 g/mL is greater than the density of water. D) The oil will float because its density of 1.14 g/mL is less than the density of water. E) none of the above

B

Determine the answer to the following equation with correct number of significant figures: 13.96 - 4.9102 + 71.5 = _ A) 80.5498 B) 81 C) 80.5 D) 80.55 E) none of the above

C

The correct decimal representation of 6.453 × 103 is: A) 6,453 B) 0.006453 C) 6.5 × 103 D) 6.453 E) none of the above

A

The correct multiplier for the prefix femto is: A) 10-15 B) 10-12 C) 1012 D) 109 E) none of the above

A

The correct multiplier for the prefix milli is: A) 10-3 B) 10-6 C) 10-9 D) 10-12 E) none of the above

A

The typical problem-solving procedure involves four steps in the order: A) sort, strategize, solve, check. B) strategize, solve, sort, check. C) check, strategize, sort, solve. D) solve, sort, check, strategize

A

Determine the answer to the following equation with correct number of significant figures: 2.02 + 8.102 - 0.0297 = _ A) 10.0923 B) 10.09 C) 10.1 D) 10.092 E) none of the above

B

The base SI unit for temperature is: A) Fahrenheit. B) Kelvin. C) Celsius. D) atmospheres. E) none of the above

B

The correct multiplier for the prefix micro is: A) 103 B) 10-6 C) 10-9 D) 106 E) none of the above

B

The correct number of significant figures in the number 0.002320 is: A) 7 B) 4 C) 3 D) ambiguous E) none of the above

B

The correct number of significant figures in the number 1.250100 is: A) 5 B) 7 C) 4 D) ambiguous E) none of the above

B

The correct number of significant figures in the number 4.0 × 10-2 is: A) 1 B) 2 C) 3 D) ambiguous. E) none of the above

B

What is the density (g/mL) of an object that has a mass of 14.01 grams and, when placed into a graduated cylinder, causes the water level to rise from 25.2 mL to 33.6 mL? A) 0.60 B) 1.7 C) 1.8 D) 2.4 E) none of the above

B

Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25 and 26 degree Celsius marks. We should properly report the temperature measurement as: A) 25°C B) 26°C C) 25.5°C D) 25.50°C E) 25.55°C

C

Determine the answer to the following equation with correct number of significant figures: (4.123 × 0.12) + 24.2 = _ A) 25 B) 24.695 C) 24.70 D) 24.7 E) none of the above

D

Determine the answer to the following equation with correct number of significant figures: 106 ÷ 9.02 × 1.9 = A) 22.32816 B) 22.328 C) 22.3 D) 22 E) none of the above

D

The common English unit in which the speed of an automobile is expressed is miles/hr. What is the set of base SI units for speed? A) mile/s B) km/hr C) km/s D) m/s E) none of the above

D

Which measurement below represents the heaviest mass? A) 1 mg B) 1 kg C) 1 pg D) 1 Mg E) 1 dg

D

Which of the following sets of units is NOT in the order of increasing size? A) μg < g < kg B) mL < dL < L C) ns < ms < s D) cm < μm < km E) μmol < mmol < mol Answer: D

D

Which term below is equivalent to one milliliter? A) 1 cc B) 1 mL C) 1 cm3 D) all of the above E) none of the above

D

There are exactly 2.54 centimeters in 1 inch. When using this conversion factor, how many significant figures are you limited to? A) 1 B) 3 C) ambiguous D) depends on if you are using it in multiplication/division or addition/subtraction E) infinite number of significant figures

E

In multiplication and division calculations, the answer will have the same number of decimal places as the number carrying the fewest decimal places.

False

In multiplication or division calculations, the answer will have the same number of decimal places as the number carrying the most decimal places.

False

The decimal number 0.0000010 expressed in scientific notation is 1.0*10^6

False

The density of iron is 7.86 g/cm3 while the density of lead is 11.4 g/cm3. If you had one cm3 of each metal, the piece of iron would have a greater mass

False

The mass of an object, 4.55 × 10^-3 g, expressed in decimal notation is 0.000455 g

False

In addition or subtraction, the result carries the same number of decimal places as the quantity carrying the fewest decimal places

True

Numbers are usually written so that the uncertainty is in the last reported digit.

True

Scientific numbers are reported so that every digit is certain except the last, which is estimated

True

The decimal number 0.0210 expressed in scientific notation is 2.10 × 10-2.

True

Trailing zeros before a decimal point but after a non-zero number are considered significant figures.

True

When the number 2.35 is rounded to contain 2 significant figures it becomes 2.4.

True

When the temperature of an object is reported as 23.7°C, the actual temperature can be assumed to be between 23.6°C and 23.8°C

True

Zeros located after a number and after a decimal point are significant.

True

The prefix micro represents the multiplier 0.001.

False

When the number 65.59 is rounded to contain 2 significant figures, it becomes 66.0

False

You do not need to write units in calculations as long as you can remember them.

False

The base unit of mass in the SI system is the kg

True

The correct prefix for the multiplier 1,000 is: A) mega. B) milli. C) micro. D) nano. E) none of the above

E

How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7) × 12.3 = A) 1 B) 2 C) 3 D) 4 E) none of the above

A

The correct prefix for the multiplier 10 is: A) deca. B) deci. C) tera. D) centi. E) none of the above

A

An American nickel five cent coin has a mass of approximately 5 grams. Five grams is equivalent to which term? A) 5000 kilograms B) 5000 milligrams C) 50 centigrams D) 5000 micrograms E) none of the above

B

How many liters are in 333 mL? A) 3.33 × 105 B) 0.333 C) 33.3 D) 3.33 E) none of the above

B

The correct prefix for the multiplier 0.1 is: A) tera. B) deci. C) femto. D) pico. E) none of the above

B

The correct prefix for the multiplier 100 is: A) mega. B) hecto. C) centi. D) nano. E) none of the above

B

The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation. A) 1.72 × 10- 9 m B) 1.72 × 10-10 m C) 0.172 × 10-10 m D) 17.2 × 9 m E) 1.72 × 10 m

B

A plastic block has dimensions of 2.2 cm × 3.0 cm × 1.5 cm and a mass of 12.4 grams. Will the block float in water and why? A) Yes, because the density of the block is 1.3 g/mL which is less than the density of water. B) Yes, because the density of the block is 0.80 g/mL which is less than the density of water. C) No, because the density of the block is 1.3 g/mL which is greater than the density of water. D) No, because the density of the block is 0.80 g/mL which is greater than the density of water. E) none of the above

C

1) The correct scientific notation for the number 0.00050210 is: A) 5.0210 × 104 B) 5.021 × 10-4 C) 5.021 × 104 D) 5.0210 × 10-4 E) none of the above

D

How many grams are in 1.48 × 107 μg? A) 1.48 × 103 B) 1.48 × 1013 C) 1.48 D) 14.8 E) none of the above

D

The correct number of significant figures in the number 865,000 is: A) 3 B) 6 C) 4 D) ambiguous E) none of the above

D

What is the base SI unit for length? A) mile B) centimeter C) foot D) meter E) none of the above

D

Suppose a symmetrical metal rod of the element lead has a density of 11.4 g/cm3. If this rod is cut in half, the density of each piece is now 5.7 g/cm3.

False

The number 4,450,000.0 has 3 significant figures

False

Exact numbers have an unlimited number of significant figures

True