Question 1

Which of the following speeds is the greatest? (1 mile = 1609 m) A)40 mi/h B)2.0 * 10⁵ mm/min C)40 km/h D)0.74 km/min E)400 m/min

Accepted Answer

The answer of Which of the following speeds is the...

Question 2

Iron has a density of 7.87 g/cm³. What mass of iron would be required to cover a football playing surface of 120 yds *60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g) A)6.4 * 10³ lb B)6.4 * 10⁴ lb C)1.0 * 10⁵ lb D)4.7 * 10⁷ lb E)4.7 * 10⁸ lb

Accepted Answer

The answer of Iron has a density of 7.87 g/cm³....

Question 3

How many cubic centimeters of an ore containing only 0.22% gold (by mass)must be processed to obtain $100 worth of gold? The density of the ore is 8.0 g/cm³ and the price of gold is $818 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g) A)0.48 cm³ B)220 cm³ C)1.4 * 10³ cm³ D)1.7 * 10³ cm³ E)1.8* 10⁴ cm³

Accepted Answer

The answer of How many cubic centimeters of an ore...

Question 4

Iron has a density of 7.86 g/cm³. The volume occupied by 55.85 g of iron is A)0.141 cm³. B)7.11 cm³. C)2.8 cm³. D)439 cm³. E)None of the above.

Accepted Answer

The answer of Iron has a density of 7.86 g/cm³....

Question 5

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 10⁸ km from Earth? A)4.4 * 10^-2 min B)1.6 * 10⁵ min C)4.0 * 10¹⁵ min D)44 min E)2.6 min

Accepted Answer

The answer of Radio waves travel at the speed of...

Question 6

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm³. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g) A)1.5 lb B)5.2 lb C)6.20 lb D)1.4 * 10³ lb E)6.4 * 10⁵ lb

Accepted Answer

The answer of Iridium is essentially tied with osmium for...

Question 7

The recommended daily allowance (RDA)of calcium is 1.2 g. Calcium carbonate contains 12.0% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium?
A)0.10 g
B)0.14 g
C)1.2 g
D)10 g
E)14 g

Accepted Answer

The answer of The recommended daily allowance (RDA)of calcium is...

Question 8

What is the volume of a 2.5 g block of metal if its density is 4.75 g/cm³? A)0.53 cm³ B)1.9 cm³ C)2.5 cm³ D)4.75 cm³ E)11.9 cm³

Accepted Answer

The volume of the metal block can be calculated using the formula volume = mass / density. Substituting the given values, volume = 2.5 g / 4.75 g/cm³ = 0.526 cm³, which rounds to 0.53 cm³.

Question 9

The "escape velocity" from Earth (the speed required to escape Earth's gravity)is 2.5 * 10⁴ miles per hour. What is this speed in m/s? (1 mile = 1609 m) A)4.2 * 10^-3 m/s B)6.9 m/s C)4.2 * 10² m/s D)1.1 * 10⁴ m/s E)4.0 * 10⁷ m/s

Accepted Answer

The answer of The "escape velocity" from Earth (the speed...

Question 10

The density of mercury is 13.6 g/cm³. What volume (in quarts)is occupied by 100. g of Hg? (1 L = 1.06 qt) A)144 qt B)7.35 qt C)7.79 qt D)7.79 * 10^{- 3} qt E)1.44 * 10^{- 4} qt

Accepted Answer

The answer of The density of mercury is 13.6 g/cm³....

Question 11

The city of Los Angeles is now approximately 2400 miles south of Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage, Alaska, in 76 million years, at what average rate will it have to move in mm per month? A)2.0 * 10^{- 10} mm/mo. B)6.6 * 10^{- 6} mm/mo. C)4.2 mm/mo. D)9.5 mm/mo. E)51 mm/mo.

Accepted Answer

The answer of The city of Los Angeles is now...

Question 12

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm³ at 25^$\circ$C). A)3.13 * 10^-5 g B)32.0 kg C)53.2 kg D)53.2 g E)None of the above.

Accepted Answer

First, we need to convert the dimensions of the room from meters to decimeters to match the unit of density given:
2.50 m = 250 dm 
5.50 m = 550 dm 
3.00 m = 300 dm 
Then, we can use the formula: 
mass = density x volume 
mass = (1.29 g/dm³) x (250 dm x 550 dm x 300 dm) 
mass = 20047500 g 
mass = 20,047.5 kg or 53.2 kg (rounded to one decimal place) 
Therefore, the correct answer is C.

Question 13

A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron? The following densities at 25^$\circ$C are provided: magnesium, 1.7 g/cm³; graphite, 1.8 g/cm³; iron, 7.9 g/cm³. A)1,400 g B)3,800 g C)830 g D)180 g E)none of them are within 10 g of the right answer.

Accepted Answer

The answer of A block of iron has a mass...

Question 14

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many kilometers will radio messages travel in exactly one year? A)9.46 * 10¹⁵ km B)7.30 * 10⁸ km C)7.10 * 10¹⁰ km D)9.46 * 10¹² km E)3.33 * 10^{- 3} km

Accepted Answer

To calculate the distance traveled in one year, we need to multiply the speed of light by the number of seconds in a year. 
Number of seconds in a year = 365 days/year x 24 hours/day x 60 minutes/hour x 60 seconds/minute = 31,536,000 seconds/year.
Distance traveled in one year = speed of light x time 
Distance = (3.00 x 10^8 m/s) x (31,536,000 s/year) = 9.46 x 10^12 m/year
Converting meters to kilometers, we get 9.46 x 10^12 m/year = 9.46 x 10^9 km/year, which is closest to option D, 9.46 x 10^12 km/year.

Question 15

The density of mercury is 13.6 g/cm³. What is the mass in pounds of 1.0 gallons of mercury? (1 lb = 453.6 g; 1 gal = 3.785 L) A)0.11 lb B)30. lb C)51 lb D)83 lb E)110 lb

Accepted Answer

The answer of The density of mercury is 13.6 g/cm³....

Question 16

Bromine is a red liquid at 25^$\circ$C. Its density is 3.12 g/cm³. What is the volume of 28.1 g of liquid bromine? A)87.7 cm³ B)0.111 cm³ C)9.01 cm³ D)28.1 cm³ E)None of the above.

Accepted Answer

Density = mass/volume
Rearranging the formula, volume = mass/density
volume = 28.1 g / 3.12 g/cm3 = 9.01 cm3. Therefore, the best choice is C.

Question 17

The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm³ at 20^$\circ$C, and that 1 carat = 0.200 g. A)2.5 cm³ B)0.40 cm³ C)0.016 cm³ D)63 cm³ E)150 cm³

Accepted Answer

To find the volume of the Hope diamond, first convert its weight from carats to grams: 44.0 carats * 0.200 g/carat = 8.8 g. Then, use the density formula (density = mass/volume) to find the volume: volume = mass/density = 8.8 g / 3.5 g/cm^3 = 2.514 cm^3, which rounds to 2.5 cm^3.

Question 18

The density of lead is 11.4 g/cm³ at 25^$\circ$C. Calculate the volume occupied by 25.0 g of lead. A)2.19 cm³ B)0.456 cm³ C)285 cm³ D)1.24 cm³ E)6.05 cm³

Accepted Answer

We can use the formula:

density = mass/volume

To find the volume, we rearrange the formula:

volume = mass/density

Substituting the given values:

volume = 25.0 g / 11.4 g/cm³ = 2.19 cm³

Therefore, the answer is A) 2.19 cm³.

Question 19

A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron? The following densities at 25^$\circ$C are provided: magnesium, 1.7 g/cm³; graphite, 1.8 g/cm³; iron, 7.9 g/cm³. A)110 g B)2120 g C)6870 g D)34 g E)none of them are within 10 g of the right answer.

Accepted Answer

The answer of A block of iron has a mass...

Question 20

Americans combined drive about 4.0*10⁹ miles per day and their vehicles get an average of 20 miles per gallon of fuel used. For each 1 kg of gasoline that is burned, about 3.0 kg of carbon dioxide are produced. How many kilograms of CO₂ are emitted into the atmosphere each day by cars in the U.S.? One gallon of gas weighs about 3.5 kg. A)2.1 * 10⁹ kg B)8.4 * 10¹¹ kg C)1.7 * 10⁸ kg D)93 kg E)none of these

Accepted Answer

The answer of Americans combined drive about 4.0*10⁹ miles per...

Quiz 1: Introduction

Which of the following speeds is the greatest? (1 mile = 1609 m)

Iron has a density of 7.87 g/cm³. What mass of iron would be required to cover a football playing surface of 120 yds *60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)

How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold? The density of the ore is 8.0 g/cm³ and the price of gold is $818 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)

Iron has a density of 7.86 g/cm³. The volume occupied by 55.85 g of iron is

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 10⁸ km from Earth?

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm³. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g)

The recommended daily allowance (RDA) of calcium is 1.2 g. Calcium carbonate contains 12.0% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium?

What is the volume of a 2.5 g block of metal if its density is 4.75 g/cm³?

The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 * 10⁴ miles per hour. What is this speed in m/s? (1 mile = 1609 m)

The density of mercury is 13.6 g/cm³. What volume (in quarts) is occupied by 100. g of Hg? (1 L = 1.06 qt)

The city of Los Angeles is now approximately 2400 miles south of Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage, Alaska, in 76 million years, at what average rate will it have to move in mm per month?

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm³ at 25^$\circ$C) .

A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron? The following densities at 25^$\circ$C are provided: magnesium, 1.7 g/cm³; graphite, 1.8 g/cm³; iron, 7.9 g/cm³.

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many kilometers will radio messages travel in exactly one year?

The density of mercury is 13.6 g/cm³. What is the mass in pounds of 1.0 gallons of mercury? (1 lb = 453.6 g; 1 gal = 3.785 L)

Bromine is a red liquid at 25^$\circ$C. Its density is 3.12 g/cm³. What is the volume of 28.1 g of liquid bromine?

The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm³ at 20^$\circ$C, and that 1 carat = 0.200 g.

The density of lead is 11.4 g/cm³ at 25^$\circ$C. Calculate the volume occupied by 25.0 g of lead.

A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron? The following densities at 25^$\circ$C are provided: magnesium, 1.7 g/cm³; graphite, 1.8 g/cm³; iron, 7.9 g/cm³.

Quiz 1: Introduction

Which of the following speeds is the greatest? (1 mile = 1609 m)

Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds *60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)

How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold? The density of the ore is 8.0 g/cm3 and the price of gold is $818 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g)

Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 108 km from Earth?

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm3. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g)

The recommended daily allowance (RDA) of calcium is 1.2 g. Calcium carbonate contains 12.0% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium?

What is the volume of a 2.5 g block of metal if its density is 4.75 g/cm3?

The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 * 104 miles per hour. What is this speed in m/s? (1 mile = 1609 m)

The density of mercury is 13.6 g/cm3. What volume (in quarts) is occupied by 100. g of Hg? (1 L = 1.06 qt)

The city of Los Angeles is now approximately 2400 miles south of Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage, Alaska, in 76 million years, at what average rate will it have to move in mm per month?

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm3 at 25 ∘\circ∘ C) .

A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron? The following densities at 25 ∘\circ∘ C are provided: magnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many kilometers will radio messages travel in exactly one year?

The density of mercury is 13.6 g/cm3. What is the mass in pounds of 1.0 gallons of mercury? (1 lb = 453.6 g; 1 gal = 3.785 L)

Bromine is a red liquid at 25 ∘\circ∘ C. Its density is 3.12 g/cm3. What is the volume of 28.1 g of liquid bromine?

The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at 20 ∘\circ∘ C, and that 1 carat = 0.200 g.

The density of lead is 11.4 g/cm3 at 25 ∘\circ∘ C. Calculate the volume occupied by 25.0 g of lead.

A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron? The following densities at 25 ∘\circ∘ C are provided: magnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.