Concept explainers
Calculate the percent by mass of the element listed first in the formulas for each of the following compounds.
methane,
sodium nitrate,
carbon monoxide,
nitrogen dioxide,
1-octanol,
calcium phosphate,
3-phenyiphenol,
aluminum acetate,
(a)
Interpretation:
Thepercent 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 47QAP
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 carbon 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 47QAP
Explanation of Solution
Mass of the sodium 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 47QAP
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 47QAP
Explanation of Solution
Mass of the nitrogen 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 47QAP
Explanation of Solution
Mass of the carbon 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 47QAP
Explanation of Solution
Mass of the calcium 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 47QAP
Explanation of Solution
Mass of the carbon 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 47QAP
Explanation of Solution
Mass of the aluminum present in
Mass percent of
Want to see more full solutions like this?
Chapter 8 Solutions
EBK INTRODUCTORY CHEMISTRY
- Express the composition of each of the following compounds as the mass percents of its elements. a. formaldehyde, CH2O b. glucose, C6H12O6 c. acetic acid, HC2H3O2arrow_forward1. Which of the following hydrocarbons has the highest mass percentage of carbon? methane, CH4 ethane, C2H6 propane, C3H8 butane, C4H10arrow_forwardWhat mass is represented by 0.0255 mol of each of the following compounds? (a) C3H7OH, 2-propanol, rubbing alcohol (b) C11H16O2, an antioxidant in foods, also known as BHA (butylated hydroxyanisole) (c) C9H8O4, aspirin (d) (CH3) 2CO, acetone, an important industrial solventarrow_forward
- Calculate, to two decimal places, the formula mass of each of the following substances. Obtain the needed atomic masses from the inside front cover of the text. a. C20H30O (vitamin A) b. C14H9Cl5 (DDT, formerly used as an insecticide) c. C8H10N4O2 (caffeine, a central nervous system stimulant) d. Ca(NO3)2 (calcium nitrate, gives fireworks their red color)arrow_forwardThe active ingredient in Pepto-Bismo® (an over- the-counter remedy for an upset stomach) is bismuth sub-salicylate, C7H5BiO4. Analysis of a 1.7500-g sample of Pepto-Bismol yields 346 mg of bismuth. What percent by mass is bismuth subsalicylate in the sample? (Assume that there are no other bismuth-containing compounds in Pepto-Bismol.)arrow_forwardWhich of the following pairs of compounds have the same empirical formula? a. acetylene, C2H2, and benzene, C6H6 b. ethane, C2H6, and butane, C4H10 c. nitrogen dioxide, NO2, and dinitrogen tetroxide, N2O4 d. diphenyl ether, C12H10O, and phenol, C6H5OHarrow_forward
- What number of atoms of nitrogen are present in 5.00 g of each of the following? a. glycine, C2H5O2N b. magnesium nitride c. calcium nitrate d. dinitrogen tetroxidearrow_forwardDetermine the number of atoms of nitrogen present in each of the following quantities. a. 10.0 g N2H4 b. 20.0 g HN3 c. 30.0 g LiNO3 d. 4.00 moles N2O5arrow_forwardHow many moles of specified particles are present in a sample of each of the following substances if each sample weighs 5.00 g? a. CO molecules b. CO2 molecules c. B4H10 molecules d. U atomsarrow_forward
- Calculate, to two decimal places, the formula mass of each of the following substances. Obtain the needed atomic masses from the inside front cover of the text. a. C12H22O11 (sucrose, table sugar) b. C7H16 (heptane, a component of gasoline) c. C7H5NO3S (saccharin, an artificial sweetener) d. (NH4)2SO4 (ammonium sulfate, a lawn fertilizer)arrow_forwardThe structure of one of the bases in DNA, adenine, is shown here. Which represents the greater mass: 40.0 g of adenine or 3.0 1023 molecules of the compound?arrow_forwardAn Alka-Seltzer tablet contains 324 mg of aspirin (C.9H8O4,), 1904 mg of NaHCO3, and 1000. mg of citric add (H3C6H5O7). (The last two compounds react with each other to provide the "fizz," bubbles of CO2, when the tablet is put into water.) (a) Calculate the amount (moles) of each substance in the tablet. (b) If you take one tablet, how many molecules of aspirin are you consuming?arrow_forward
- Chemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- Chemistry & 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 LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning