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Concept explainers
(a)
Interpretation:
The molar mass of
Concept Introduction:
The molar mass (M) of any atom, molecule or compound is the mass (in grams) of one mole of the substance. The molar mass of an element is numerically equal to its
(b)
Interpretation:
The molar mass of
Concept Introduction:
Refer to part a.
(c)
Interpretation:
The molar mass of
Concept Introduction:
Refer to part a.
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Chapter 3 Solutions
Chemistry: Principles and Practice
- Chlorine exists mainly as two isotopes, 37Cl and 33Cl. Which is more abundant? How do you know?arrow_forwardWhich molecule has a molecular mass of 28.05 amu?arrow_forwardSalvarsan was long thought to be a single substance. Recently, however, a mass spectrometry study of the compound shows it to be a mixture of two molecules with the same empirical formula. Each has the composition 39.37% C, 3.304% H, 8.741% O, 7.652% N, and 40.932% As. One has a molar mass of 549 g/mol and the other has a molar mass of 915 g/mol. What are the molecular formulas of the compounds?arrow_forward
- Nitrogen 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_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_forwardCalculate the molar mass of each of the following:(a) the anesthetic halothane, C2HBrClF3(b) the herbicide paraquat, C12H14N2Cl2(c) caffeine, C8H10N4O2(d) urea, CO(NH2)2(e) a typical soap, C17H35CO2Naarrow_forward
- Calculate the following quantities:(a) mass, in grams, of 0.105 mol sucrose 1C12H22O112(b) moles of Zn1NO322 in 143.50 g of this substance(c) number of molecules in 1.0 * 10-6 mol CH3CH2OH(d) number of N atoms in 0.410 mol NH3arrow_forward(c) What is the mass, in grams, of 5.20 x 1023 molecules of aspirin, CgH3O4? (d) What is the molar mass of a particular compound if 0.100 mol weighs 6.64 g? g/molarrow_forward(a) What is the mass, in grams, of 1.223 mol of iron(III)sulfate?(b) How many moles of ammonium ions are in 6.955 g ofammonium carbonate?(c) What is the mass, in grams, of 1.50 x 1021 molecules ofaspirin, C9H8O4?(d) What is the molar mass of diazepam (Valium®) if 0.05570mol has a mass of 15.86 g?arrow_forward
- A student heated a 3.32-g sample of a hydrate and recovered 2.02 g of an anhydrous compound. (b) The formula of the anhydrous compound was MgC2O4. Calculate the number of moles of anhydrous compound recovered.arrow_forwarda) What is the mass, in grams, of 2.50 x 10-3 mol ofammonium phosphate?(b) How many moles of chloride ions are in 0.2550 g ofaluminum chloride?(c) What is the mass, in grams, of 7.70 x 1020 molecules ofcaffeine, C8H10N4O2?(d) What is the molar mass of cholesterol if 0.00105 mol hasa mass of 0.406 g?arrow_forwardAnswer true or false. (b) Avogadro’s number, to three significant figures, is 6.02 x 1023 formula units per mole. (d) 1 mol of H2O contains 3 x 6.02 x 1023 formula units. (i) 1 mol of ibuprofen, C13H18O2, contains 33 mol of atoms.arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistryChemistryISBN: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
- 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 Learning
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