Question 1

A pure diamond has a density of 3.52 g/cm³.Which of the following equations will allow you to correctly calculate the density in terms of kg/dm³?

Accepted Answer

The answer of A pure diamond has a density of...

Question 2

A college runner set a school record of 3:59.37 in the mile run.Assuming that the distance was measured accurately to five significant figures,what was the runner's average speed in kilometers per hour?

Accepted Answer

To find the runner's average speed in kilometers per hour, we need to convert the distance from miles to kilometers and the time from minutes to hours.

Distance in kilometers:
1 mile = 1.609344 kilometers
So, distance = 1.609344 km

Time in hours:
3 minutes and 59.37 seconds = (3 + 59.37/60) minutes = 3.9895 minutes
1 minute = 60 seconds
So, time = 3.9895/60 hours = 0.0665 hours

Average speed = distance/time
= (1.609344/0.0665) km/hr
= 24.203 km/hr

Therefore, the best choice is C.

Question 3

A certain liquid has a density of 1.25 g/cm³.Which drawing below most closely represents the volume of this liquid needed to obtain 5.00 g of the liquid?

Accepted Answer

The answer of A certain liquid has a density of...

Question 4

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 30.kilometers in Death Valley.

Accepted Answer

First, convert 30 kilometers to miles (1 mile = 1.60934 kilometers), so 30 km ≈ 18.64 miles. Since a visitor needs 1 quart of water for every 2 miles, they would need 9.32 quarts for 18.64 miles. Since 1 quart ≈ 0.946 liters, 9.32 quarts ≈ 8.8 liters.

Question 5

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. g = 0.0220 ×  × 12.0
After performing the calculation,the student's calculator appeared as shown below:
To the correct number of significant figures what is the value of g?

Accepted Answer

To determine the correct number of significant figures, we need to look at the input values. The only input value given with a decimal point is 0.0220, which has 3 significant figures. The other values (11ea7e2d_d07c_5a6d_a2f7_456e9addc184_TB4940_11 and 12.0) are integers and therefore have an infinite number of significant figures.

Next, we look at the calculation itself. Since multiplication is being performed, the final answer should have the same number of significant figures as the value with the least number of significant figures, which is 0.0220.

Performing the calculation:

g = 0.0220 × 11ea7e2d_d07c_5a6d_a2f7_456e9addc184_TB4940_11 × 12.0 
g = 3186.048

Rounding this answer to three significant figures gives:

g = 6.00 × 10^-3

Therefore, the best choice is C.

Question 6

How many significant figures are there in the answer to the following problem? (8.881 × 2.100)+ 0.590 = ?

Accepted Answer

The multiplication of 8.881 and 2.100 gives us 18.7018. Since the given numbers have 3 and 3 significant figures respectively, the least significant figure can be taken as the product of the two numbers (i.e., 1 significant figure). When we add 0.590 to the result, we get 19.2918. Since the given number has 3 significant figures, our final answer should be rounded off to 19.3, which has four significant figures in total. Therefore, the correct choice is D, which represents four significant figures.

Question 7

A fishing boat accidentally spills 15 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?

Accepted Answer

The volume of oil spilled is 15 barrels x 42 gallons/barrel = 630 gallons.Converting gallons to liters: 630 gallons x 3.785 liters/gallon = 2385 liters.Converting liters to cubic meters: 2385 liters x 10^-3 m^3/liter = 2.385 m^3.The area covered by the oil slick is given by:Area = Volume / ThicknessArea = 2.385 m^3 / (2.5 x 10^-9 m) = 9.54 x 10^6 m^2.Therefore, the oil slick will cover 9.54 x 10^6 m^2.

Question 8

The winner of the men's 1500-meter speed skating event at a recent Winter Olympics had a time of 1:45.57.Assuming that the distance was measured accurately to five significant figures,what was the skater's average speed in miles per hour?

Accepted Answer

To find the average speed in miles per hour, first convert the distance from meters to miles (1500 meters = 0.932056788 miles, using the conversion 1 mile = 1609.34 meters). Then, convert the time from minutes and seconds to hours (1 minute and 45.57 seconds = 1.7595 hours, using the conversion 1 hour = 3600 seconds). The average speed is then calculated as distance/time = 0.932056788 miles / 1.7595 hours = 0.5297 miles/minute. To convert this to miles per hour, multiply by 60 (minutes in an hour), giving an average speed of approximately 31.790 miles per hour.

Question 9

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. P =  After performing the calculation,the student's calculator appeared as shown below:
To the correct number of significant figures what is the value of P?

Accepted Answer

To determine the correct value of P with the correct number of significant figures, we need to look at the last value in the calculator display: TB4940_00. This value represents the uncertainty in the calculation, which is in this case 0.0001. 
Since P has five significant figures (including the uncertain digit), we need to round it to the nearest 0.0001. 
Looking at the calculator display, we see that the last four digits are 2618, which is closer to 0 than to 9999. Therefore, we round down the fourth decimal place to get P = 2.430. 
Choice C is the only option that matches this value.

Question 10

The temperature of 1.00 mL of water is raised by 1.00°C for every 4.184 joules of heat absorbed by the water.How many liters of water can be raised from 21.0°C to 100.0°C by the absorption of 8.88 kcal of heat generated by the combustion of natural gas?

Accepted Answer

The amount of heat required to raise the temperature of 1 mL of water by 1°C is 4.184 joules. To convert 8.88 kcal to joules, we use the conversion factor 1 kcal = 4184 joules. Thus, 8.88 kcal = 8.88 * 4184 joules = 37171.52 joules. The temperature difference is 100.0°C - 21.0°C = 79.0°C. The total heat required to raise the temperature of 1 mL of water by 79°C is 4.184 joules/mL/°C * 79°C = 330.536 joules. Therefore, the amount of water that can be heated is 37171.52 joules / 330.536 joules/mL = 112.4 mL, which is 0.112 L.

Question 11

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 173-pound man?

Accepted Answer

First, convert the man's weight from pounds to kilograms: 173 pounds ≈ 78.47 kg (using the conversion 1 pound ≈ 0.453592 kg). Then, calculate 1.4% of 78.47 kg to find the mass of calcium: (1.4/100) * 78.47 kg ≈ 1.09858 kg, which rounds to approximately 1.1 kg of calcium.

Question 12

An international group of zookeepers with successful breeding programs made the following animal exchanges last year.Using the same bartering system,how many oryxes can a zoo obtain in exchange for 15 flamingos? 3 oryxes = 1 tiger 2 flamingos = 1 anteater
1 camel = 6 anteaters 5 lemurs = 1 rhino
1 rhino = 4 monkeys 3 lemurs = 1 camel
3 monkeys = 1 tiger 1 rhino = 4 oryxes

Accepted Answer

The answer of An international group of zookeepers with successful...

Question 13

An automobile uses gasoline at a rate of 35 mi/gal,which is the same as ________ km/L (1 km = 0.6214 mi,1 gal = 3.78 L).

Accepted Answer

To convert 35 miles per gallon to kilometers per liter, we first need to convert miles to kilometers and gallons to liters.

35 miles/gallon = 35 x 1.60934 km/0.6214 miles ÷ 3.78 L/gallon

This simplifies to:

35 miles/gallon = 15 kilometers per liter

Therefore, the answer is choice B.

Question 14

A tortoise moves at a speed of 454 cm/min.How fast is the tortoise in mph?

Accepted Answer

To convert the tortoise's speed from cm/min to mph, first convert cm to meters (454 cm = 4.54 meters), then meters to miles (1 meter = 0.000621371 miles), so 4.54 meters/min = 0.002822 miles/min. Then, convert minutes to hours (multiply by 60), so 0.002822 miles/min * 60 = 0.16932 miles/hour, which rounds to approximately 0.17 mph.

Question 15

When 1.0 gram of hydrogen reacts with 8.0 grams of oxygen 9.0 grams of water are produced and 142 kJ of heat are released.How many grams of hydrogen and how many grams of oxygen must react to produce 250 kJ of heat?

Accepted Answer

To produce 250 kJ of heat, we use the ratio of heat produced to reactants. 1.0 g H₂ and 8.0 g O₂ produce 142 kJ, so for 250 kJ, we need (250/142) times the amount of each reactant. This results in approximately 1.8 g H₂ and 14 g O₂.

Question 16

Combustion of hydrogen releases 142 kJ per gram of hydrogen reacted.How many kilocalories of energy are released by the combustion of 16.0 ounces of hydrogen?

Accepted Answer

First, convert 16.0 ounces to grams, knowing that 1 ounce = 28.3495 grams. So, 16.0 ounces * 28.3495 grams/ounce = 453.592 grams. Then, multiply the mass of hydrogen by the energy released per gram: 453.592 grams * 142 kJ/gram = 64410.064 kJ. To convert kJ to kcal, use the conversion factor 1 kcal = 4.184 kJ. So, 64410.064 kJ * (1 kcal / 4.184 kJ) = 15392.2 kcal, which is approximately 1.54 × 10^4 kcal.

Question 17

To the correct number of significant figures,an automobile traveling at 28 mi/h is traveling at ________ km/h (1 km = 0.6214 mi).

Accepted Answer

To convert 28 mi/h to km/h, divide by 0.6214. The result is approximately 45.06 km/h, which rounds to 45 km/h to the correct number of significant figures (2 significant figures, matching the 28 mi/h).

Question 18

How many significant figures are there in the answer for the following problem?  = ?

Accepted Answer

The answer of How many significant figures are there in...

Question 19

You are visiting the planet Lagmom.The money exchange rates are shown below.How many Lagmom fizzbarts will you receive in exchange for $500 at the Lagmom Spaceport Currency Exchange counter? $1.00 = 10 razz 1 morb = 25 pobs
5 pobs = 1 fizzbart 5 razz = 1 tanta
1 tanta = 2 morbs

Accepted Answer

To convert $500 to fizzbarts, we need to follow the following steps:
$500 --> 500 pobs (1.00 = 10 razz and 1 morb = 25 pobs)
500 pobs --> 100 fizzbarts (5 pobs = 1 fizzbart)
100 fizzbarts is equivalent to 1.00 x 10^14 fizzbarts.

Therefore, Option C, which is given as 1.00 x 10^14 fizzbarts, is the correct answer.

Question 20

A motorcycle emits 9.5 g of carbon monoxide per kilometer driven.How many pounds of carbon monoxide does the motorcycle generate over 5.0 years if the motorcycle is driven 15,000 miles per year?

Accepted Answer

The answer of A motorcycle emits 9.5 g of carbon...

Quiz 1: Chemical Tools: Experimentation and Measurement

A pure diamond has a density of 3.52 g/cm³.Which of the following equations will allow you to correctly calculate the density in terms of kg/dm³?

A college runner set a school record of 3:59.37 in the mile run.Assuming that the distance was measured accurately to five significant figures,what was the runner's average speed in kilometers per hour?

A certain liquid has a density of 1.25 g/cm³.Which drawing below most closely represents the volume of this liquid needed to obtain 5.00 g of the liquid?

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 30.kilometers in Death Valley.

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. g = 0.0220 × × 12.0 After performing the calculation,the student's calculator appeared as shown below: To the correct number of significant figures what is the value of g?

How many significant figures are there in the answer to the following problem? (8.881 × 2.100) + 0.590 = ?

A fishing boat accidentally spills 15 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?

The winner of the men's 1500-meter speed skating event at a recent Winter Olympics had a time of 1:45.57.Assuming that the distance was measured accurately to five significant figures,what was the skater's average speed in miles per hour?

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. P = After performing the calculation,the student's calculator appeared as shown below: To the correct number of significant figures what is the value of P?

The temperature of 1.00 mL of water is raised by 1.00°C for every 4.184 joules of heat absorbed by the water.How many liters of water can be raised from 21.0°C to 100.0°C by the absorption of 8.88 kcal of heat generated by the combustion of natural gas?

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 173-pound man?

An automobile uses gasoline at a rate of 35 mi/gal,which is the same as ________ km/L (1 km = 0.6214 mi,1 gal = 3.78 L) .

A tortoise moves at a speed of 454 cm/min.How fast is the tortoise in mph?

When 1.0 gram of hydrogen reacts with 8.0 grams of oxygen 9.0 grams of water are produced and 142 kJ of heat are released.How many grams of hydrogen and how many grams of oxygen must react to produce 250 kJ of heat?

Combustion of hydrogen releases 142 kJ per gram of hydrogen reacted.How many kilocalories of energy are released by the combustion of 16.0 ounces of hydrogen?

To the correct number of significant figures,an automobile traveling at 28 mi/h is traveling at ________ km/h (1 km = 0.6214 mi) .

How many significant figures are there in the answer for the following problem? = ?

You are visiting the planet Lagmom.The money exchange rates are shown below.How many Lagmom fizzbarts will you receive in exchange for $500 at the Lagmom Spaceport Currency Exchange counter? $1.00 = 10 razz 1 morb = 25 pobs 5 pobs = 1 fizzbart 5 razz = 1 tanta 1 tanta = 2 morbs

A motorcycle emits 9.5 g of carbon monoxide per kilometer driven.How many pounds of carbon monoxide does the motorcycle generate over 5.0 years if the motorcycle is driven 15,000 miles per year?

Quiz 1: Chemical Tools: Experimentation and Measurement

A pure diamond has a density of 3.52 g/cm3.Which of the following equations will allow you to correctly calculate the density in terms of kg/dm3?

A college runner set a school record of 3:59.37 in the mile run.Assuming that the distance was measured accurately to five significant figures,what was the runner's average speed in kilometers per hour?

A certain liquid has a density of 1.25 g/cm3.Which drawing below most closely represents the volume of this liquid needed to obtain 5.00 g of the liquid?

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles traveled on foot.Calculate the approximate number of liters required for a person to walk 30.kilometers in Death Valley.

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. g = 0.0220 × × 12.0 After performing the calculation,the student's calculator appeared as shown below: To the correct number of significant figures what is the value of g?

How many significant figures are there in the answer to the following problem? (8.881 × 2.100) + 0.590 = ?

A fishing boat accidentally spills 15 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 102 nm thick,how many square meters will the oil slick cover?

The winner of the men's 1500-meter speed skating event at a recent Winter Olympics had a time of 1:45.57.Assuming that the distance was measured accurately to five significant figures,what was the skater's average speed in miles per hour?

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory. P = After performing the calculation,the student's calculator appeared as shown below: To the correct number of significant figures what is the value of P?

The temperature of 1.00 mL of water is raised by 1.00°C for every 4.184 joules of heat absorbed by the water.How many liters of water can be raised from 21.0°C to 100.0°C by the absorption of 8.88 kcal of heat generated by the combustion of natural gas?

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 173-pound man?

An automobile uses gasoline at a rate of 35 mi/gal,which is the same as ________ km/L (1 km = 0.6214 mi,1 gal = 3.78 L) .

A tortoise moves at a speed of 454 cm/min.How fast is the tortoise in mph?

When 1.0 gram of hydrogen reacts with 8.0 grams of oxygen 9.0 grams of water are produced and 142 kJ of heat are released.How many grams of hydrogen and how many grams of oxygen must react to produce 250 kJ of heat?

Combustion of hydrogen releases 142 kJ per gram of hydrogen reacted.How many kilocalories of energy are released by the combustion of 16.0 ounces of hydrogen?

To the correct number of significant figures,an automobile traveling at 28 mi/h is traveling at ________ km/h (1 km = 0.6214 mi) .

How many significant figures are there in the answer for the following problem? = ?

You are visiting the planet Lagmom.The money exchange rates are shown below.How many Lagmom fizzbarts will you receive in exchange for $500 at the Lagmom Spaceport Currency Exchange counter? $1.00 = 10 razz 1 morb = 25 pobs 5 pobs = 1 fizzbart 5 razz = 1 tanta 1 tanta = 2 morbs

A motorcycle emits 9.5 g of carbon monoxide per kilometer driven.How many pounds of carbon monoxide does the motorcycle generate over 5.0 years if the motorcycle is driven 15,000 miles per year?

A pure diamond has a density of 3.52 g/cm³.Which of the following equations will allow you to correctly calculate the density in terms of kg/dm³?

A certain liquid has a density of 1.25 g/cm³.Which drawing below most closely represents the volume of this liquid needed to obtain 5.00 g of the liquid?

A fishing boat accidentally spills 15 barrels of diesel oil into the ocean.Each barrel contains 42 gallons.If the oil film on the ocean is 2.5 × 10² nm thick,how many square meters will the oil slick cover?