Principles of General Chemistry
3rd Edition
ISBN: 9780073402697
Author: SILBERBERG, Martin S.
Publisher: McGraw-Hill College
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Textbook Question
Chapter 2, Problem 2.3P
Which of the following are pure substances? Explain.
(a) Calcium chloride, used to melt ice roads, consists of two etements, calcium and chlorine, in a fixed mass ratio.
(b) Sulfur consists of sulfur atoms combined into octatomic moIecules.
(c) Baking powder, a leavening agent, Contains 26% to 30% sodium hydrogen carbonate and 30% to 35% calcium dihydrogen phosphate by mass.
(d) Cytosine, a component of DNA, Consists of H, C, N, and 0 atoms bonded in a specific arrangement.
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Which of the following are pure substances? Explain.(a) Calcium chloride, used to melt ice on roads, consists of twoelements, calcium and chlorine, in a fixed mass ratio.(b) Sulfur consists of sulfur atoms combined into octatomicmolecules.(c) Baking powder, a leavening agent, contains 26% to 30%sodium hydrogen carbonate and 30% to 35% calcium dihydro-gen phosphate by mass.(d) Cytosine, a component of DNA, consists of H, C, N, and Oatoms bonded in a specific arrangement.Classify each substance as an element, com-pound, or mixture, and explain your answers
Which of the following are pure substances? Explain.(a) Calcium chloride, used to melt ice on roads, consists of twoelements, calcium and chlorine, in a fixed mass ratio.(b) Sulfur consists of sulfur atoms combined into octatomicmolecules.(c) Baking powder, a leavening agent, contains 26% to 30%sodium hydrogen carbonate and 30% to 35% calcium dihydro-gen phosphate by mass.(d) Cytosine, a component of DNA, consists of H, C, N, and Oatoms bonded in a specific arrangement.
Capsaicin, the compound that gives the lhot taste to chili peppers, has the formula C18H27NO3.(a) Calculate its molar mass.(b) If you eat 55 mg of capsaicin, what amount (moles) have you consumed?(c) Calculate the mass percent of each element in the compound.(d) What mass of carbon (in milligrams) is there in 55 mg of capsaicin?
Chapter 2 Solutions
Principles of General Chemistry
Ch. 2 - What is the key difference between an element and...Ch. 2 - List two differences between a compound and a...Ch. 2 - Which of the following are pure substances?...Ch. 2 - Classify each substance in Problem 2.3 as an...Ch. 2 - Each scene below represents a mixture. Describe...Ch. 2 - To which classes of matter—element, compound,...Ch. 2 - Identify the mass law that each of the following...Ch. 2 - Prob. 2.8PCh. 2 - (a) Does the percent by mass of each element in a...Ch. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Show, with calculations, how the following data...Ch. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - Prob. 2.28PCh. 2 - Prob. 2.29PCh. 2 - Write the ZAX notation for each atomic depiction:Ch. 2 - Write the ZAX notation for each atomic depiction:Ch. 2 - Prob. 2.32PCh. 2 - Draw atomic depictions similar to those in Problem...Ch. 2 - Gallium has two naturally occurring isotopes,...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - Prob. 2.40PCh. 2 - Prob. 2.41PCh. 2 - Prob. 2.42PCh. 2 - Fill in the blanks: (a) The symbol and atomic...Ch. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Given that the ions in LiF and in MgO are of...Ch. 2 - Prob. 2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51PCh. 2 - Prob. 2.52PCh. 2 - Prob. 2.53PCh. 2 - Prob. 2.54PCh. 2 - An ionic compound forms when calcium (Z=20) reacts...Ch. 2 - Prob. 2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58PCh. 2 - Prob. 2.59PCh. 2 - Prob. 2.60PCh. 2 - Write a formula for each of the following...Ch. 2 - Prob. 2.62PCh. 2 - Give the name and formula of the compound formed...Ch. 2 - Prob. 2.64PCh. 2 - Prob. 2.65PCh. 2 - Prob. 2.66PCh. 2 - Prob. 2.67PCh. 2 - Prob. 2.68PCh. 2 - Prob. 2.69PCh. 2 - Prob. 2.70PCh. 2 - Prob. 2.71PCh. 2 - Prob. 2.72PCh. 2 - Prob. 2.73PCh. 2 - Prob. 2.74PCh. 2 - Prob. 2.75PCh. 2 - Prob. 2.76PCh. 2 - Prob. 2.77PCh. 2 - Give the formula, name, and molecular mass of the...Ch. 2 - Prob. 2.79PCh. 2 - Prob. 2.80PCh. 2 - Prob. 2.81PCh. 2 - Prob. 2.82PCh. 2 - Prob. 2.83PCh. 2 - Prob. 2.84PCh. 2 - Prob. 2.85PCh. 2 - Prob. 2.86PCh. 2 - Prob. 2.87PCh. 2 - Prob. 2.88PCh. 2 - Prob. 2.89PCh. 2 - Scenes A— depict various types of matter on the...Ch. 2 - The scvcn most abundant ions in seawater make up...Ch. 2 - Prob. 2.92PCh. 2 - Prob. 2.93PCh. 2 - Prob. 2.94PCh. 2 - Prob. 2.95PCh. 2 - Prob. 2.96PCh. 2 - Dinitrogen monoxide (N2O;nitrousoxide) is a...Ch. 2 - Prob. 2.98PCh. 2 - Prob. 2.99PCh. 2 - Prob. 2.100PCh. 2 - A rock is 5.0% by mass fayalite (Fe2SiO4)7.0% by...Ch. 2 - The two isotopes of potassium with significant...Ch. 2 - Prob. 2.103PCh. 2 - Prob. 2.104PCh. 2 - Prob. 2.105PCh. 2 - Prob. 2.106P
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