Steven S. Zumdahl, Donald J. DeCoste
ISBN #9780538757089
7th Edition
370 Questions
Homework Questions
Introductory Chemistry: A Foundation is a comprehensive textbook that establishes the core principles of chemistry through a systematic exploration from the scientific method and accurate measurements to the behavior of matter at the atomic level. It guides readers through fundamental topics such as atomic theory, chemical nomenclature, and the nature of chemical reactions, building a strong foundation for understanding how substances interact and transform. The text further delves into complex concepts including energy transformations, chemical bonding, gas laws, and the quantitative aspects of chemical compositions and reactions. By blending theoretical explanations with practical applications, the book equips students with the problem-solving skills essential for both academic pursuits and real-world chemical challenges.
Chapter 1
Chemistry: An Introduction
Chapter 2
Measurements and Calculations
Chapter 3
Matter
Chapter 4
Chemical Foundations: Elements, Atoms, and lons
Chapter 5
Nomenclature
Chapter 6
Chemical Reactions: An Introduction
Chapter 7
Reactions in Aqueous Solutions
Chapter 8
Chemical Composition
Chapter 9
Chemical Quantities
Chapter 10
Energy
Chapter 11
Modern Atomic Theory
Chapter 12
Chemical Bonding
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Chapter 13
Gases
Chapter 14
Liquids and Solids
Chapter 15
Solutions
Chapter 16
Acids and Bases
Chapter 17
Equilibrium
Chapter 18
Oxidation-Reduction Reactions and Electrochemistry
Chapter 19
Radioactivity and Nuclear Energy
Chapter 20
Organic Chemistry
Chapter 21
Biochemistry
Problem 1
Give the formula for calcium phosphate and then answer the following questions: a. Calculate the percent composition of each of the elements in this compound. b. If you knew that there was $50.0 \mathrm{g}$ of phosphorus in your sample, how many grams of calcium phosphate would you have? How many moles of calcium phosphate would this be? How many formula units of calcium phosphate?
Shaelyn Deal Numerade Educator
Problem 2
You are making cookies and are missing a key ingredient-eggs. You have plenty of the other ingredients, except that you have only 1.33 cups of butter and no eggs. You note that the recipe calls for 2 cups of butter and 3 eggs (plus the other ingredients) to make 6 dozen cookies. You telephone a friend and have him bring you some eggs. a. How many eggs do you need? b. If you use all the butter (and get enough eggs), how many cookies can you make? Unfortunately, your friend hangs up before you tell him how many eggs you need. When he arrives, he has a surprise for you-to save time he has broken the eggs in a bowl for you. You ask him how many he brought, and he replies, "All of them, but I spilled some on the way over." You weigh the eggs and find that they weigh $62.1 \mathrm{g} .$ Assuming that an average egg weighs $34.21 \mathrm{g}$ c. How much butter is needed to react with all the eggs? d. How many cookies can you make? e. Which will you have left over, eggs or butter? f. How much is left over? g. Relate this question to the concepts of chemical stoichiometry.
David Collins Numerade Educator
Problem 3
a. There are 365 days/year, 24 hours/day, 12 months/ year, and 60 minutes/hour. How many minutes are there in one month? b. There are 24 hours/day, 60 minutes/hour, 7 days/ week, and 4 weeks/month. How many minutes are there in one month? c. Why are these answers different? Which (if either) is more correct and why?
Nicole Smina Numerade Educator
Problem 4
You go to a convenience store to buy candy and find the owner to be rather odd. He allows you to buy pieces only in multiples of four, and to buy four, you need $\$ 0.23 .$ He allows you only to use 3 pennies and 2 dimes. You have a bunch of pennies and dimes, and instead of counting them, you decide to weigh them. You have $636.3 \mathrm{g}$ of pennies, and each penny weighs an average of $3.03 \mathrm{g}$. Each dime weighs an average of $2.29 \mathrm{g}$. Each piece of candy weighs an average of $10.23 \mathrm{g}$ a. How many pennies do you have? b. How many dimes do you need to buy as much candy as possible? c. How much would all of your dimes weigh? d. How many pieces of candy could you buy (based on the number of dimes from part b)? e. How much would this candy weigh? f. How many pieces of candy could you buy with twice as many dimes?
Ronald Prasad Numerade Educator
Problem 5
In some cases the Roman numeral in a name is the same as a subscript in the formula, and in some cases it is not. Provide an example (formula and name) for each of these cases. Explain why the Roman numeral is not necessarily the same as the subscript.
Problem 6
You place hot metal into a beaker of cold water. a. Eventually what is true about the temperature of the metal compared to that of the water? Explain why this is true. b. Label this process as endothermic or exothermic if we consider the system to be i. the metal. Explain. il. the water. Explain.
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