Relate single, double and triple bonds to one, two and three shared electron pairs, and explain why a higher bond order gives a shorter and stronger bond, using bond enthalpy and bond length data from the data booklet.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2026.
How many sigma bonds and pi bonds are in a molecule of the fatty acid shown, C12H20O2? In each option the number of sigma bonds is given first and the number of pi bonds second. A. 13 sigma, 3 pi B. 33 sigma, 6 pi C. 33 sigma, 3 pi D. 36 sigma, 3 pi
(i) For the carbonate ion, draw its Lewis formula. (ii) Write the chemical formula of ammonium carbonate. (iii) State why all three C–O bonds in the carbonate ion are identical. (iv) Using section 11 of the data booklet, predict the length of the C–O bonds in…
What is the number of bonding pairs of electrons in propanedioic acid, HOOC−CH2−COOH? A. 8 B. 10 C. 12 D. 20
Sulfur dioxide, SO2, can be represented by more than one Lewis (electron dot) structure. (i) Sketch two different Lewis (electron dot) structures of SO2, one in which all atoms obey the octet rule and one in which sulfur does not. (ii) State the…
How many sigma (σ) bonds and how many pi (π) bonds does one molecule of the compound below contain? HC≡C−CH=CH−C≡N A. 5 σ and 8 π B. 8 σ and 5 π C. 9 σ and 5 π D. 13 σ and 5 π
Ozone, O3, absorbs ultraviolet radiation with a wavelength of 300 nm and dissociates. Oxygen, O2, does not dissociate at this wavelength. Which comparison of the bonds in O3 with the bond in O2 is correct? A. Longer and weaker B.…
Which allotrope of oxygen, O2 or O3, has the longer bond between oxygen atoms, and which is dissociated by ultraviolet radiation of the longer wavelength? A. Longer bond: ozone; longer wavelength: ozone B. Longer bond: oxygen; longer wavelength:…
(i) Draw the Lewis formula of methanal. (ii) Explain the electron domain geometry around the carbon atom in methanal.
Compare, giving a reason, the length of a carbon–nitrogen bond within the quinazoline ring system with the length of a carbon–nitrogen bond in the diethylamino group.
The average bond lengths of three carbon-halogen bonds are shown. What is the order of increasing bond strength? A. C−Cl < C−Br < C−I B. C−I < C−Br < C−Cl C. C−Br < C−I < C−Cl D.…
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