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Chapter 19 Solutions
Chemistry: Atoms First V1
- Don't used hand raiting and don't used Ai solutionarrow_forwardHow would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers? (a) CH3C=CCH3 || and CH3CH2C=CH (b) CH3CCH=CHCH3 and CH3CCH2CH=CH2 Problem 12-41 The mass spectrum (a) and the infrared spectrum (b) of an unknown hydrocarbon are shown. Propose as many structures as you can. (a) 100 Relative abundance (%) 80 60 60 40 200 20 (b) 100 Transmittance (%) 10 20 20 80- 60- 40- 20 40 60 80 100 120 140 m/z 500 4000 3500 3000 2500 2000 1500 Wavenumber (cm-1) 1000arrow_forwardPropagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware: Glassware Uncertainty (assume glassware has been calibrated and treat the values below as random error) 1.00 mL volumetric pipet 0.01 mL 10.00 mL volumetric pipet 0.02 mL 100.00 mL volumetric flask 0.08 mL Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask. 2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.arrow_forward
- Draw all resonance structures for the following ion: CH₂ Draw all resonance structures on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars, including charges where needed. The single bond is active by default. 2D ד CONT HD EXP CON ? 1 [1] Α 12 Marvin JS by Chemaxon A DOO H C N Br I UZ OSPFarrow_forwardWhat is the average mass of the 10 pennies? Report your value with correct significant figures. What is the error (uncertainty) associated with each mass measurement due to the equipment? What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation. What is the standard deviation of the 10 mass measurements? Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement? Calculate the total mass of the pennies with associated uncertainty. Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.arrow_forwardCan you help me and explain the answers please.arrow_forward
- B 1 of 2 Additional problems in preparation to Midterm #1: 1.) How can the following compounds be prepared using Diels-Alder reaction: CH3 O CN (a) (b) CN CH3 2.) What is the missing reagent in the shown reaction? H3C + ? H3C H3C CN H3C ''CN (၁) H 3.) Write the products 1,2-addition and 1,4-addition of DBr to 1,3-cyclohexadiene. Remember, D is deuterium, a heavy isotope of hydrogen. It reacts exactly like hydrogen. 4.) In the shown reaction, which will be the kinetic product and which will be the thermodynamic product? H3C CI H3C HCI H3C + 5.) Which of the following molecules is aromatic? (a) (b) (c) H 6.) Which of the following molecules is aromatic? (a) (b) (c) 7.) Write the mechanism for the shown reaction. + Ха AICI 3 CI 8.) Suggest reagents that would convert benzene into the shown compounds. CI NO2 -8-6-6-8-a (a) (b) (c) (d) (e) (a) SO3H Brarrow_forwardThe number of 2sp^2 hybridized atoms in is: A. 8; B. 6; C.4; D.2; E.0;arrow_forwardThe highest boiling compound from among the following isA. 2-methylheptane; B. 3-methylheptane; C. 2,2-dimethylhexane;D. octane; E. 2,2,3-trimethylpentanearrow_forward
- Which of the following features are found in the most stable structure ofCH5NO that does not have a CO bond?w. a π bond, x. two NH bonds, y. one OH bond, z. 3 lone pairsA. w, x; B. x, y; C. y, z; D. x, y, z; E. all of them.arrow_forwardWhich one of the following functional groups is not present in thecompound shownA. amine; B. aldehyde, C. ether; D. amide. E. ketonearrow_forwardWhich of the following formulas correspond to at least one compound inwhich resonance is important?w. C2H5N x. C3H5Br; y. C3H4; z. C4H6.A. w, x, y; B. x, y, z; C. w, x, z; D. w, y, z; E. all of themarrow_forward
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