Zadanie 10
Which hybridization is shown by the carbon atom and by the nitrogen atom in hydrogen cyanide, HCN? A. C: sp, N: sp B. C: sp, N: sp2 C. C: sp2, N: sp D. C: sp2, N:…
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Which hybridization is shown by the carbon atom and by the nitrogen atom in hydrogen cyanide, HCN? A. C: sp, N: sp B. C: sp, N: sp2 C. C: sp2, N: sp D. C: sp2, N:…
(i) State the electron configuration of a nitrogen atom. (ii) Draw the Lewis formula of ammonia. (iii) Deduce the electron domain geometry and the molecular geometry of the ammonia molecule. (iv) Explain why the ammonia molecule is polar.
In the atmosphere, nitrogen dioxide combines with rain water and oxygen to give nitric acid. State the equation for this reaction, including state symbols.
Which row lists these molecules in order of increasing bond angle? A. NF3, SiH4, HCHO, C2H2 B. SiH4, NF3, HCHO, C2H2 C. NF3, HCHO, SiH4, C2H2 D. C2H2, HCHO,…
Which monomer produces this addition polymer? A. CH2=CHCH2CH3 B. CH3CH=CHCH3 C. CH2=C(CH3)2 D. CH2=CHCH=CH2
Which list arranges the metals in order of increasing strength of metallic bonding (weakest first)? A. Rb, Mg, Na, Al B. Al, Mg, Na, Rb C. Rb, Na, Mg, Al D. Na, Rb, Al, Mg
A mixture of biphenyl, C12H10, and 4-phenylphenol, C12H10O, was separated by thin-layer chromatography on a polar silica plate, using the non-polar solvent cyclohexane as the mobile phase. What are the position and the retardation factor…
Why is the first ionization energy of sulfur greater than that of magnesium? A. The outer electrons of sulfur are further from the nucleus. B. Sulfur atoms have more occupied main energy levels. C. Sulfur atoms have a greater nuclear charge, while the…
Which element belongs to the f-block of the periodic table? A. Nd B. Fr C. Ta D. Pb
In the 19th century benzene was proposed to be cyclohexa-1,3,5-triene, a ring with three localized carbon-carbon double bonds. Which observation contradicts this model? A. Benzene is a planar molecule with bond angles of 120° B. The enthalpy of hydrogenation…