Zadanie 33
What is the name of this compound? BrCH2CH2CH(CH3)CH2CH3 A. 1-bromo-3-ethylbutane B. 5-bromo-3-methylpentane C. 1-bromo-3-methylpentane D. 1-bromo-2-ethylbutane
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What is the name of this compound? BrCH2CH2CH(CH3)CH2CH3 A. 1-bromo-3-ethylbutane B. 5-bromo-3-methylpentane C. 1-bromo-3-methylpentane D. 1-bromo-2-ethylbutane
Which compound is the organic product when CH3CH2COOH and CH3CH2CH(OH)CH3 are heated together in the presence of concentrated sulfuric acid? A. CH3CH2COCH(CH3)CH2CH3 B. CH3CH2CH(CH3)COOCH2CH3 C. CH3CH2COOCH(CH3)CH2CH3 D.…
Which combination is correct for a reaction with an equilibrium constant K much smaller than 1 at 298 K under standard conditions? A. Ecell⊖ is negative and ΔG⊖ is positive B. Ecell⊖ is positive and…
Which reaction would be the fastest under the same conditions? A. CH3CH2CH(Cl)CH3 + OH− B. CH3CH2C(CH3)2Cl + OH− C. CH3CH2CH(I)CH3 + OH− D. CH3CH2C(CH3)2I + OH−
What is the major product formed when bromine, Br2, reacts with but-1-ene in an inert solvent? A. 2,2-dibromobutane B. 2-bromobutane C. 1,2-dibromobutane D. 1-bromobutane
A 25.0 cm3 sample of ethanol weighed 19.725 g at 20 °C. What is the density of ethanol in g cm−3? A. 0.79 B. 0.789 C. 0.7890 D. 0.78900
Which graph shows the correct relationship between the pressure and the temperature in °C of a fixed amount of an ideal gas at constant volume? A. Graph A B. Graph B C. Graph C D. Graph D
A signal in the 1H NMR spectrum of an organic compound is a triplet. What does the splitting of this signal show? A. There are three hydrogen atoms in the chemical environment that gives the signal. B. There are three different chemical environments for…
What are the number of signals and the splitting of these signals in the 1H NMR spectrum of ethoxyethane, CH3CH2OCH2CH3? A. 1 signal, a singlet B. 2 signals, a triplet and a quartet C. 2 signals, two triplets D. 2 signals, a doublet and a quartet
A sample of ammonium sulfate, (NH4)2SO4, has a mass of 66.1 g. Mr = 132.17 How many moles of ammonium ions are present in the sample? A. 0.25 B. 0.50 C. 1.00 D. 1.50