Zadanie 12
In which compound are all the carbon atoms sp2 hybridized? A. Buta-1,3-diene, CH2=CH−CH=CH2 B. Propene, CH2=CH−CH3 C. Propadiene, CH2=C=CH2 D. But-2-yne, CH3−C≡C−CH3
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In which compound are all the carbon atoms sp2 hybridized? A. Buta-1,3-diene, CH2=CH−CH=CH2 B. Propene, CH2=CH−CH3 C. Propadiene, CH2=C=CH2 D. But-2-yne, CH3−C≡C−CH3
What is the molecular geometry of ClF3? A. Trigonal planar B. Trigonal pyramidal C. Trigonal bipyramidal D. T-shaped
What are the electron domain geometry and the molecular geometry of the ClF3 molecule? A. Electron domain geometry: octahedral; molecular geometry: trigonal planar B. Electron domain geometry: octahedral; molecular geometry: T-shaped C. Electron domain…
Identical pieces of zinc, each of mass 0.65 g, are added to two solutions of hydrochloric acid, X and Y, at the same initial temperature. Each reaction takes place in an identical insulated container and the mixture is stirred. Which statement is…
Burning 0.500 g of propan-1-ol, CH3CH2CH2OH, heats 200 g of water by 12.4 K. Specific heat capacity of water: 4.18 J g−1 K−1. What is the enthalpy of combustion of propan-1-ol, in…
What is the enthalpy change for the following reaction? CH2=CHCH3 + HCl → CH3CHClCH3 A. +73.0 kJ B. −73.0 kJ C. −165.3 kJ D. −216.8 kJ
Which row gives the signs of ΔH and ΔS for a reaction that is spontaneous at low temperatures but non-spontaneous at high temperatures? A. ΔH < 0, ΔS < 0 B. ΔH < 0, ΔS > 0 C. ΔH > 0, ΔS < 0 D.…
Which compound has the largest lattice enthalpy? A. MgBr2 B. NaCl C. CaCl2 D. MgCl2
Which equation represents the bond enthalpy of the H–Cl bond in hydrogen chloride? A. B. HCl(g) → H+(g) + Cl−(g) C. HCl(g) → H(g) + Cl(g) D. HCl(aq) → H(g) + Cl(g)
In which reaction does the entropy of the system decrease? A. 2 H2(g) + O2(g) → 2 H2O(l) B. CaCO3(s) → CaO(s) + CO2(g) C. N2O4(g) → 2 NO2(g) D. KNO3(s) → K+(aq) + NO3−(aq)