Concept explainers
Calculate the percent by mass of the element listed first in the formulas for each of the following compounds.
l type="a">
i>copper(I) bromide,
i>iron(II) chloride,
i>iron(III) chloride,
i>cobalt(II) iodide,
i>cobalt(III) iodide,
i>tin(II) oxide,
i>tin(IV)oxide,
(a)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
A chemical compound is a collection of several atoms. Molar masses of each and every atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Mass of the copper present in
Mass percent of
(b)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the copper present in
Mass percent of
(c)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the carbon present in
Mass percent of
(d)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the iron present in
Mass percent of
(e)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the cobalt present in
Mass percent of
(f)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the cobalt present in
Mass percent of
(g)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the tin present in
Mass percent of
(h)
Interpretation:
The percent by mass of element listed first in the formula of a compound should be calculated.
Concept Introduction:
A chemical compound is a collection of several atoms. Molar masses of each atom collectively provide the molar mass of that compound.
Mass fraction for a given element can be converted into mass percent by multiplying
Answer to Problem 48QAP
Explanation of Solution
Mass of the tin present in
Mass percent of
Want to see more full solutions like this?
Chapter 8 Solutions
Student Solutions Manual For Zumdahl/decoste's Introductory Chemistry: A Foundation, 8th Edition
- The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d = 5.72 g/cm3) that is 3.00 cm on edge is allowed to react with 1.01 1024 molecules of arsenic triiodide, what mass of As2I4 can be prepared? If the percent yield of As2I4 was 75.6%, what mass of As2I4 was actually isolated?arrow_forwardThe principal component of mothballs is naphthalene, a compound with a molecular mass of about 130 amu, containing only carbon and hydrogen. A 3.000-mg sample of naphthalene burns to give 10.3 mg of CO2. Determine its empirical and molecular formulas.arrow_forwardWhen analyzed, an unknown compound gave these experimental results: C, 54.0%; h, 6.00%; and O, 40.0%. Four different students used these values to calculate the empirical formulas shown here. Which answer is correct? Why did some students not get the correct answer? (a) C4H5O2 (b) C5H7O3 (c) C7H10O4 (d) C9H12O5arrow_forward
- Tetrodotoxin is a toxic chemical found in fugu pufferfish, a popular but rare delicacy in Japan. This compound has an LD50 (the amount of substance that is lethal to 50.% of a population sample) of 10.g per kg of body mass. Tetrodotoxin is 41.38% carbon by mass, 13.16% nitrogen by mass, and 5.37% hydrogen by mass, with the remaining amount consisting of oxygen. What is the empirical formula of tetrodotoxin? If three molecules of tetrodotoxin have a mass of 1.59 1021 g, what is the molecular formula of tetrodotoxin? What number of molecules of tetrodotoxin would be the LD50 dosage for a person weighing 165 lb?arrow_forwardA substance X2Z has the composition (by mass) of 40.0% X and 60.0% Z. What is the composition (by mass) of the compound XZ2?arrow_forwardThe present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry textbook estimates that if 1.00 × 108 tons Mg were taken out of the sea each year, it would take one million years for the Mg concentration to drop to 0.12%. Do sufficient calculations to either verify or refute this statement. Assume that Earth is a sphere with a diameter of 8000 mi, 67% of which is covered by oceans to a depth of 1 mi, and that no Mg is washed back into the oceans at any time.arrow_forward
- Atomic masses are relative masses. What does this mean?arrow_forwardNitrogen fixation in the root nodules of peas and other legumes occurs with a reaction involving a molybdenum-containing enzyme named nitrogenase. This enzyme contains two Mo atoms per molecule and is 0.0872% Mo by mass. Calculate the molar mass of the enzyme.arrow_forwardYou have a 20.0-g sample of silver metal. You are given 10.0 g of another metal and told that tills sample contains twice the number of atoms as the sample of silver metal. Is this possible?arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning