Chemistry: Atoms First
18th Edition
ISBN: 9781938168154
Author: Richard Langley, Klaus Theopold, Paul Flowers
Publisher: OpenStax College
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Chapter 6, Problem 18E
A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.
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NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at
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How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
Chapter 6 Solutions
Chemistry: Atoms First
Ch. 6 - What is the total mass (amu) of carbon in each of...Ch. 6 - What is the total mass of hydrogen in each of the...Ch. 6 - Calculate the molecular or formula mass of each of...Ch. 6 - Determine the molecular mass of the following...Ch. 6 - Determine the molecular mass of the following...Ch. 6 - Which molecule has a molecular mass of 28.05 amu?Ch. 6 - What information do we need to determine the...Ch. 6 - Calculate the following to four significant...Ch. 6 - Determine the following to four significant...Ch. 6 - Determine the percent ammonia, NH3, in Co(...
Ch. 6 - Determine the percent water in CuSO45H2O to three...Ch. 6 - Determine the empirical formulas for compounds...Ch. 6 - Determine the empirical formulas for compounds...Ch. 6 - A compound of carbon and hydrogen contains 92.3% C...Ch. 6 - Dichioroethane, a compound that is often used for...Ch. 6 - Determine the empirical and molecular formula for...Ch. 6 - Polymers are large molecules composed of simple...Ch. 6 - A major textile dye manufacturer developed a new...Ch. 6 - Explain what changes and what stays the same when...Ch. 6 - What information do we need to calculate the...Ch. 6 - A 200-mL sample and a 400-mL sample of a solution...Ch. 6 - Determine the molarity for each of the following...Ch. 6 - Determine the molarity of each of the following...Ch. 6 - Consider this question: What is the mass of the...Ch. 6 - Consider this question: What is the mass of solute...Ch. 6 - Calculate the number of moles and the mass of the...Ch. 6 - Calculate the number of moles and the mass of the...Ch. 6 - Consider this question: What is the molarity of...Ch. 6 - Consider this question: What is the molarity of...Ch. 6 - Calculate the molarity of each of the following...Ch. 6 - Calculate the molarity of each of the following...Ch. 6 - There is about 1.0 g of calcium, as Ca2+, in LO L...Ch. 6 - What volume of a 1.00MFe( NO3)3 solution can be...Ch. 6 - If 0.1718 L of a 0.3556-M C3H7OH solution is...Ch. 6 - If 4.12 L of a 0.850 MH3PO4 solution is be diluted...Ch. 6 - What volume of a 0.33MC12H22O11 solution can be...Ch. 6 - What is the concentration of the NaCl solution...Ch. 6 - What is the molarity of the diluted solution when...Ch. 6 - What is the final concentration of the solution...Ch. 6 - A 2.00-L bottle of a solution of concentrated HCl...Ch. 6 - An experiment in a general chemistry laboratory...Ch. 6 - What volume of a 0.20MK2SO4 solution contains 57 g...Ch. 6 - The US Environmental Protection Agency (EPA)...Ch. 6 - Consider this question: What mass of a...Ch. 6 - What mass of a 4.00% NaOH solution by mass...Ch. 6 - What mass of solid NaOH (97.0% NaOH by mass) is...Ch. 6 - What mass of HCl is contained in 45.0 mL of an...Ch. 6 - The hardness of water (hardness count) is usually...Ch. 6 - The hardness of water (hardness count) is usually...Ch. 6 - In Canada and the United Kingdom, devices that...Ch. 6 - A throat spray is 1.40% by mass phenol, C6H5OH, in...Ch. 6 - Copper(I) iodide (CuI) is often added to table...Ch. 6 - A cough syrup contains 5.0% ethyl alcohol, C2H5OH,...Ch. 6 - D5W is a solution used as an intravenous fluid. It...Ch. 6 - Find the molarity of a 40.0% by mass aqueous...
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- true or false, given that a 20.00 mL sample of NaOH took 24.15 mL of 0.141 M HCI to reach the endpoint in a titration, the concentration of the NaOH is 1.17 M.arrow_forwardin the bromothymol blue experiment, pKa was measured. A closely related compound has a Ka of 2.10 x 10-5. What is the pKa?a) 7.1b) 4.7c) 2.0arrow_forwardcalculate the equilibrium concentration of H2 given that K= 0.017 at a constant temperature for this reaction. The inital concentration of HBr is 0.050 M.2HBr(g) ↔ H2(g) + Br2(g)a) 4.48 x 10-2 M b) 5.17 x 10-3 Mc) 1.03 x 10-2 Md) 1.70 x 10-2 Marrow_forward
- true or falsegiven these two equilibria with their equilibrium constants:H2(g) + CI2(l) ↔ 2HCI(g) K= 0.006 CI2(l) ↔ CI2(g) K= 0.30The equilibrium contstant for the following reaction is 1.8H2(g) + CI2 ↔ 2HCI(g)arrow_forwardI2(g) + CI2(g) ↔ 2ICIK for this reaction is 81.9. Find the equilibrium concentration of I2 if the inital concentration of I2 and CI2 are 0.010 Marrow_forwardtrue or false,the equilibrium constant for this reaction is 0.50.PCI5(g) ↔ PCI3(g) + CI2(g)Based on the above, the equilibrium constant for the following reaction is 0.25.2PCI5(g) ↔. 2PCI3(g) + 2CI2(g)arrow_forward
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