Question 1

Problem Solving in Chemistry and Engineering 
A metallic cylinder displaces 91.0 mL and has a mass of 245.7 g. What is the density of the metal?

Accepted Answer

The answer of Problem Solving in Chemistry and Engineering 
A...

Question 2

Numbers and Measurements 
A rock is placed on a balance and its mass is determined to be 22.410 g. When the rock is then placed in a graduated cylinder that originally contains 11.34 mL of water the new volume is 17.82 mL. What should the density of the rock be reported as?

Accepted Answer

The answer of Numbers and Measurements 
A rock is placed...

Question 3

Focus on Problem Solving Exercises 
A student was given two metal cubes that looked similar. One was 1.05 cm on an edge and had a mass of 14.32 grams; the other was 2.66 cm on a side and had a mass of 215.3 grams. How can the student determine if these two cubes of metal are the same material using only the data given?

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A student...

Question 4

Problem Solving in Chemistry and Engineering 
Mercury has a density of 13.6 g/mL. What is the mass of 4.72 L of mercury?

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Mercury...

Question 5

Problem Solving in Chemistry and Engineering 
In the description of the refining of aluminum the molecular scale depiction of precipitation was not included. Use the web to determine what chemicals are involved in the precipitation process and draw a molecular scale drawing of this reaction.

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The answer of Problem Solving in Chemistry and Engineering 
In...

Question 6

Insight into Materials Selection and Bicycle Frames 
Use the web to research the elastic modulus and yield strength of carbon fiber composites. How do these materials compare to aluminum, steel and titanium?

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The answer of Insight into Materials Selection and Bicycle Frames...

Question 7

Problem Solving in Chemistry and Engineering Carry out the following unit conversions. a) 82 μ g to mg b) 6.73 × 10^{− 4} mm to nm c) 1.37 × 10⁶ nA to Ma d) 4.8 × 10¹⁸ mW to GW

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Carry...

Question 8

Problem Solving in Chemistry and Engineering 
If the cost to fill a gasoline tank is $78.42 and gasoline costs $3.66/gal, how many gallons does the tank hold? How many L of gasoline could be purchased for $50.00?

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If...

Question 9

Insight into Materials Selection and Bicycle Frames 
Rank aluminum, steel and titanium in order of increasing stiffness.

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Question 10

Numbers and Measurements 
In an attempt to determine the velocity of a person on a bicycle, an observer uses a stopwatch and times the length of time it takes to cover 25 "squares" on a sidewalk. A measurement of one of the squares shows it to be 1.13 m long. The bicycle takes 4.82 seconds to travel this far. What velocity, in m/sec, should the observer report?

Accepted Answer

The answer of Numbers and Measurements 
In an attempt to...

Question 11

Problem Solving in Chemistry and Engineering 
Draw a molecular scale picture to show how a crystal differs from a liquid.

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Draw...

Question 12

Focus on Problem Solving Exercises 
A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. What information would you need to look up and how would you determine the percentage of ethanol in this solution?

Accepted Answer

The answer of Focus on Problem Solving Exercises 
A solution...

Question 13

Insight into Materials Selection and Bicycle Frames 
Aluminum is not as strong as steel. What other factor should be considered when comparing the desirability of aluminum versus steel if strength is an important consideration for a design?

Accepted Answer

The answer of Insight into Materials Selection and Bicycle Frames...

Question 14

Problem Solving in Chemistry and Engineering If a particle is traveling at 98% of the speed of light in a vacuum (2.998 x 10⁸ m/s), what is its velocity in miles per hour? 1.00 miles = 1.61 km.

Accepted Answer

The answer of Problem Solving in Chemistry and Engineering 
If...

Question 15

Numbers and Measurements 
Express each of the following temperatures in ° C. 
a) 177 K 
b) 298 K 
c) 4 K 
d) 1500 K

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Express each of the...

Question 16

Problem Solving in Chemistry and Engineering 
The distance between two atoms in a molecule is 148 pm. What is this distance in meters?

Accepted Answer

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The...

Question 17

Numbers and Measurements 
Measurements indicate that 23.6% of the residents of a city with a population of 531,314 are college graduates. Considering significant figures, how many college graduates are estimated to reside in this city.

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The answer of Numbers and Measurements 
Measurements indicate that 23.6%...

Question 18

Numbers and Measurements Assuming the numbers given are measurements, carry out the indicated arithmetic operations and give the answer with the correct number of significant figures. a) 7.132 / 6 b) 3.65 × 10² + 8.1 × 10³ c) 18.13 − 1.3 d) 9 × 10^{− 6} × 1.33 × 10^{− 3}

Accepted Answer

The answer of Numbers and Measurements 
Assuming the numbers given...

Question 19

Focus on Problem Solving Exercises 
Battery acid has a density of 1.285 g/mL and contains 38.0% sulfuric acid by mass. Describe how you would determine the mass of pure sulfuric acid in a car battery, noting what item(s) you would have to measure or look up.

Accepted Answer

The answer of Focus on Problem Solving Exercises 
Battery acid...

Question 20

Numbers and Measurements 
How many significant figures are present in each of the following experimental measurements? 
a) 0.003 m 
b) 6030 kg 
c) 400.3 s 
d) 0.000701 L 
e) 31.624 km

Accepted Answer

The answer of Numbers and Measurements 
How many significant figures...

Quiz 1: Introduction to Chemistry

Problem Solving in Chemistry and Engineering A metallic cylinder displaces 91.0 mL and has a mass of 245.7 g. What is the density of the metal?

Numbers and Measurements A rock is placed on a balance and its mass is determined to be 22.410 g. When the rock is then placed in a graduated cylinder that originally contains 11.34 mL of water the new volume is 17.82 mL. What should the density of the rock be reported as?

Problem Solving in Chemistry and Engineering Mercury has a density of 13.6 g/mL. What is the mass of 4.72 L of mercury?

Problem Solving in Chemistry and Engineering In the description of the refining of aluminum the molecular scale depiction of precipitation was not included. Use the web to determine what chemicals are involved in the precipitation process and draw a molecular scale drawing of this reaction.

Insight into Materials Selection and Bicycle Frames Use the web to research the elastic modulus and yield strength of carbon fiber composites. How do these materials compare to aluminum, steel and titanium?

Problem Solving in Chemistry and Engineering Carry out the following unit conversions. a) 82 μ g to mg b) 6.73 × 10 − 4 mm to nm c) 1.37 × 106 nA to Ma d) 4.8 × 1018 mW to GW

Problem Solving in Chemistry and Engineering If the cost to fill a gasoline tank is $78.42 and gasoline costs $3.66/gal, how many gallons does the tank hold? How many L of gasoline could be purchased for $50.00?

Insight into Materials Selection and Bicycle Frames Rank aluminum, steel and titanium in order of increasing stiffness.

Problem Solving in Chemistry and Engineering Draw a molecular scale picture to show how a crystal differs from a liquid.

Focus on Problem Solving Exercises A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. What information would you need to look up and how would you determine the percentage of ethanol in this solution?

Insight into Materials Selection and Bicycle Frames Aluminum is not as strong as steel. What other factor should be considered when comparing the desirability of aluminum versus steel if strength is an important consideration for a design?

Problem Solving in Chemistry and Engineering If a particle is traveling at 98% of the speed of light in a vacuum (2.998 x 108 m/s), what is its velocity in miles per hour? 1.00 miles = 1.61 km.

Numbers and Measurements Express each of the following temperatures in ° C. a) 177 K b) 298 K c) 4 K d) 1500 K

Problem Solving in Chemistry and Engineering The distance between two atoms in a molecule is 148 pm. What is this distance in meters?

Numbers and Measurements Measurements indicate that 23.6% of the residents of a city with a population of 531,314 are college graduates. Considering significant figures, how many college graduates are estimated to reside in this city.

Numbers and Measurements Assuming the numbers given are measurements, carry out the indicated arithmetic operations and give the answer with the correct number of significant figures. a) 7.132 / 6 b) 3.65 × 102 + 8.1 × 103 c) 18.13 − 1.3 d) 9 × 10 − 6 × 1.33 × 10 − 3

Focus on Problem Solving Exercises Battery acid has a density of 1.285 g/mL and contains 38.0% sulfuric acid by mass. Describe how you would determine the mass of pure sulfuric acid in a car battery, noting what item(s) you would have to measure or look up.

Numbers and Measurements How many significant figures are present in each of the following experimental measurements? a) 0.003 m b) 6030 kg c) 400.3 s d) 0.000701 L e) 31.624 km

Problem Solving in Chemistry and Engineering Carry out the following unit conversions. a) 82 μ g to mg b) 6.73 × 10^{− 4} mm to nm c) 1.37 × 10⁶ nA to Ma d) 4.8 × 10¹⁸ mW to GW

Problem Solving in Chemistry and Engineering If a particle is traveling at 98% of the speed of light in a vacuum (2.998 x 10⁸ m/s), what is its velocity in miles per hour? 1.00 miles = 1.61 km.

Numbers and Measurements Assuming the numbers given are measurements, carry out the indicated arithmetic operations and give the answer with the correct number of significant figures. a) 7.132 / 6 b) 3.65 × 10² + 8.1 × 10³ c) 18.13 − 1.3 d) 9 × 10^{− 6} × 1.33 × 10^{− 3}