Zadanie 7
In which set do all the species contain delocalized electrons? A. NH4+, C6H12, Si(s) B. CH3OH, SO2, C (diamond) C. C2H4, NO3−, SiO2 D. CO32−, C6H6, Cu(s)
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In which set do all the species contain delocalized electrons? A. NH4+, C6H12, Si(s) B. CH3OH, SO2, C (diamond) C. C2H4, NO3−, SiO2 D. CO32−, C6H6, Cu(s)
What is the molecular geometry of PCl3F2? A. trigonal bipyramidal B. trigonal planar C. square pyramidal D. pentagonal
Formal charges can be used to choose between possible Lewis structures for the cyanate ion, NCO−. Which structure is preferred? Non-bonding pairs are not shown; each atom has a complete octet. A. [N=C=O]− B. [N≡C−O]− C. [N−C≡O]−…
Which pair of statements about the electrons in this molecule is correct? A. 3 non-bonding pairs of electrons and 8 electrons in π bonds B. 5 non-bonding pairs of electrons and 8 electrons in π bonds C. 5 non-bonding pairs of electrons and 10 electrons…
Copper can be hammered into thin sheets without shattering. Which feature of metallic bonding explains this? A. The delocalized electrons are free to move through the lattice, carrying charge. B. The metallic bonds are weak, so the cations are easily displaced…
The repeating unit of an addition polymer is [CH2−CH(CN)]n. Which monomer forms this polymer? A. H2C=CHCN B. CH3CH2CN C. NCCH=CHCN D. H2C=CHCH2CN
Aqueous solutions of nickel(II) sulfate, which contain [Ni(H2O)6]2+ ions, are green. Use section 15 of the data booklet. Which statement explains the colour? A. Green light is absorbed when an electron is promoted between the split 3d orbitals. B.…
Which molecule contains an ester functional group? A. CH3CH2COOH B. CH3CH2OCH2CH3 C. CH3COOCH2CH3 D. CH3CH2CHO
Which characteristic determines the block of the periodic table in which an element is placed? A. the number of valence electrons the element has B. the number of occupied main energy levels C. whether the element is a metal, a metalloid or a non-metal D. the…
Which element forms a stable compound in which its oxidation state is +6? A. Ti B. V C. Cr D. Zn