Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
8th Edition
ISBN: 9781285199030
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Stoichiometry
Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "elem…
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Chapter 8, Problem 87AP

A binary compound of magnesium and nitrogen is analyzed, and 1.2791 g of the compound ¡s found to contain 0.9240 g of magnesium. When a second sample of this compound is treated with water and heated, the nitrogen is driven off as ammonia, leaving a compound that contains 60.31% magnesium and 39.69% oxygen by mass. Calculate the empirical formulas of the two magnesium compounds.

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Chapter 8 Solutions

Introductory Chemistry: A Foundation

Ch. 8.2 - ercise 8.1 Calculate the mass of a sample that...Ch. 8.2 - Prob. 8.2SCCh. 8.3 - at if you were offered $1 million to count from 1...Ch. 8.3 - at if you discovered Avogadro’s number was not...Ch. 8.3 - ercise 8.3 Chromium (Cr) is a metal that is added...Ch. 8.5 - ercise 8.4 Polyvinyl chloride (called PVC), which...Ch. 8.5 - ercise 8.5 Calculate the molar mass for sodium...Ch. 8.5 - ercise 8.6 The substance Teflon, the slippery...Ch. 8.6 - ercise 8.7 Penicillin, an important antibiotic...Ch. 8.8 - ercise 8.8 In a lab experiment it was observed...
Ch. 8.8 - trong>Exercise 8.9 Sevin, the commercial name for...Ch. 8.8 - e part of the problem-solving strategy for...Ch. 8.8 - ercise 8.10 The most common form of nylon...Ch. 8.9 - Exercise 8.11 A compound used as an additive for...Ch. 8 - n chemistry, what is meant by the term mole? What...Ch. 8 - hat is the difference between the empirical and...Ch. 8 - substance A2B is 60% A by mass. Calculate the...Ch. 8 - ive the formula for calcium phosphate and then...Ch. 8 - ow would you find the number of “chalk molecules”...Ch. 8 - 0.821 -mol sample of a substance composed of...Ch. 8 - ow many molecules of water are there in a 10.0-g...Ch. 8 - hat is the mass (in grams) of one molecule of...Ch. 8 - onsider separate 100.0-g samples of each of the...Ch. 8 - A molecule has a mass of 4.651023 g. Provide two...Ch. 8 - Differentiate between the terms atomic mass and...Ch. 8 - Consider Figure 4.19 in the text. 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How...Ch. 8 - What mass of hydrogen contains the same number of...Ch. 8 - What mass of cobalt contains the same number of...Ch. 8 - If an average sodium atom has a mass of 3.821023...Ch. 8 - Ifan average fluorine atom has a mass of 3.161023...Ch. 8 - Which has the smaller mass, 1 mole of He atoms or...Ch. 8 - Which weighs less, 0.25 mole of xenon atoms or 2.0...Ch. 8 - Use the average atomic masses given inside the...Ch. 8 - Use the average atomic masses given inside the...Ch. 8 - Use the average atomic masses given inside the...Ch. 8 - Use the average atomic masses given inside the...Ch. 8 - Using the average atomic masses given inside the...Ch. 8 - Using the average atomic masses given inside the...Ch. 8 - The _________ of a substance is the mass (in...Ch. 8 - Prob. 26QAPCh. 8 - Give the name and calculate the molar mass for...Ch. 8 - Give the name and calculate the molar mass for...Ch. 8 - Write the formula and calculate the molar mass for...Ch. 8 - Prob. 30QAPCh. 8 - Calculate the number of moles of the indicated...Ch. 8 - Prob. 32QAPCh. 8 - Prob. 33QAPCh. 8 - Calculate the number of moles of the indicated...Ch. 8 - Calculate the mass in grams of each of the...Ch. 8 - Calculate the mass in grams of each of the...Ch. 8 - Calculate the mass in grams of each of the...Ch. 8 - Calculate the mass in grams of each of the...Ch. 8 - Calculate the number of molecules present in each...Ch. 8 - Calculate the number of molecules present in each...Ch. 8 - Calculate the number of moles of carbon atoms...Ch. 8 - Calculate the number of moles of sulfur atoms...Ch. 8 - The mass fraction of an element present in a...Ch. 8 - If the amount of a sample doubles, what happens to...Ch. 8 - lculate the percent by mass of each element in the...Ch. 8 - Calculate the percent by mass of each element in...Ch. 8 - Calculate the percent by mass of the element...Ch. 8 - Calculate the percent by mass of the element...Ch. 8 - Prob. 49QAPCh. 8 - What is the mass percent of oxygen in each of the...Ch. 8 - For each of the following samples of ionic...Ch. 8 - For each of the following ionic substances,...Ch. 8 - Prob. 53QAPCh. 8 - Explain lo a friend who has not yet taken a...Ch. 8 - Give the empirical formula that corresponds to...Ch. 8 - Which of the following pairs of compounds have the...Ch. 8 - A compound was analyzed and was found to contain...Ch. 8 - A compound was analyzed and was found to contain...Ch. 8 - A 0.59980-g sample of a new compound has been...Ch. 8 - A compound was analyzed and was found to contain...Ch. 8 - If a 1.271-g sample of aluminum metal is heated in...Ch. 8 - A compound was analyzed and was found to contain...Ch. 8 - When 3.269 g of zinc is heated in pure oxygen, the...Ch. 8 - If cobalt metal is mixed with excess sulfur and...Ch. 8 - If 1.25 g of aluminum metal is heated in an...Ch. 8 - If 2.50 g of aluminum metal is heated in a stream...Ch. 8 - A compound used ¡n the nuclear industry has the...Ch. 8 - A compound was analyzed and was found to contain...Ch. 8 - A compound has the following percentage...Ch. 8 - When lithium metal is heated strongly in an...Ch. 8 - A compound has been analyzed and has been found to...Ch. 8 - Tetraphenylporphyrin is a synthetic compound that...Ch. 8 - When 1.00 mg of lithium metal is reacted with...Ch. 8 - Phosphorus and chlorine form two binary compounds,...Ch. 8 - How does the molecular formula of a compound...Ch. 8 - Prob. 76QAPCh. 8 - A binary compound of boron and hydrogen has the...Ch. 8 - A compound with empirical formula CH was found by...Ch. 8 - A compound with the empirical formula CH2 was...Ch. 8 - A compound with empirical formula C2H5O was found...Ch. 8 - A compound having an approximate molar mass of...Ch. 8 - A compound consists of carbon and hydrogen. The...Ch. 8 - Use the periodic table shown in Fig. 4.9 to...Ch. 8 - Complete the following table. l> Mass of Sample...Ch. 8 - Complete the following table. l> Mass of Sample...Ch. 8 - Consider a hypothetical compound composed of...Ch. 8 - A binary compound of magnesium and nitrogen is...Ch. 8 - When a 2.11 8-g sample of copper is heated in an...Ch. 8 - Hydrogen gas reacts with each of the halogen...Ch. 8 - Calculate the number of atoms of each element...Ch. 8 - Calculate the mass in grams of each of the...Ch. 8 - Calculate the mass of carbon in grams, the percent...Ch. 8 - Find the item in column 2 that best explains or...Ch. 8 - Prob. 94APCh. 8 - Calculate the number of grams of cobalt that...Ch. 8 - Prob. 96APCh. 8 - Calculate the number of grains of lithium that...Ch. 8 - Given that the molar mass of carbon tetrachloride,...Ch. 8 - Calculate the mass in grains of hydrogen present...Ch. 8 - f you have equal mole samples of NO2 and F2 ,...Ch. 8 - strikingly beautiful copper compound with the...Ch. 8 - Prob. 102APCh. 8 - Prob. 103APCh. 8 - Prob. 104APCh. 8 - Prob. 105APCh. 8 - f an average sodium atom weighs 22.99 amu, how...Ch. 8 - Prob. 107APCh. 8 - Prob. 108APCh. 8 - Prob. 109APCh. 8 - Prob. 110APCh. 8 - Prob. 111APCh. 8 - Prob. 112APCh. 8 - alculate the number of moles of the indicated...Ch. 8 - Consider equal mole samples of tetraphosphorus...Ch. 8 - Prob. 115APCh. 8 - Prob. 116APCh. 8 - alculate the number of moles of hydrogen atoms...Ch. 8 - ow many anions are there in 5.00 g of calcium...Ch. 8 - Prob. 119APCh. 8 - Prob. 120APCh. 8 - 1.2569-g sample of a new compound has been...Ch. 8 - hat mass of sodium hydroxide has the same number...Ch. 8 - hen 2.004 g of calcium is heated in pure nitrogen...Ch. 8 - You find a compound composed only of element X and...Ch. 8 - hen 1.00 g of metallic chromium is heated with...Ch. 8 - hen barium metal is heated in chlorine gas, a...Ch. 8 - Prob. 127CPCh. 8 - itamin B12 , cyancobalamin, is essential for human...Ch. 8 - Prob. 129CPCh. 8 - . 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