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.
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
Chemistry: Principles and Practice
- 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_forwardWhich molecule has a molecular mass of 28.05 amu?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_forward
- A sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) contains 2.59 1023 atoms of hydrogen and is 17.3% hydrogen by mass. If the molar mass of the hydrocarbon is between 55 and 65 g/mol, what amount (moles) of compound is present, and what is the mass of the sample?arrow_forward(a) One molecule of the antibiotic penicillin G has a massof 5.342 x 10-21 g. What is the molar mass of penicillin G?(b) Hemoglobin, the oxygen-carrying protein in red blood cells,has four iron atoms per molecule and contains 0.340% iron bymass. Calculate the molar mass of hemoglobin.arrow_forwardA compound has the composition of 66.6% Carbon, 11.2% Hydrogen, and 22.2% Oxygen, by mass. If the molar mass is 144.2 g/mol, what is its molecular formula? (A) C4H8O (B) C8H16O2 (C) C8H16O (D) C6H12O4arrow_forward
- Give the empirical formula of each of the following compounds if a sample contains (a) 0.0130 mol C, 0.0390 mol H, and 0.0065 mol O; (b) 11.66 g iron and 5.01 g oxygenarrow_forwardCalculate the percentage by mass of the indicated element in the following compounds: (d) platinum in PtCl21NH322, a chemotherapy agent called cisplatin; (e) oxygen in the female sex hormone estradiol, C18H24O2; (f) carbon in capsaicin, C18H27NO3, the compound that gives the hot taste to chili peppers.arrow_forward(c) An organic compound consists of carbon, hydrogen and sulfur only. The percentage of carbon by mass in this compound was found to be 30.27%. The complete combustion of 1.367 g this compound produces 1.765 g of sulfur dioxide (SO2) (i) Determine the empirical formula for this compound. (ii) If a sample of this compound having the mass 3.781 × 103 mg contains 9.528 × 10–3 moles of the compound, determine the molecular formula.arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning