Chem 230 (Altamirano) Final exam Questions With Complete Solutions

Give the ground state electron configuration for I correct answer: [Kr]5s^2, 4d^10, 5p^5 Which of the following is a strong acid? A. CH3NH2 B. CH3O- C. H2N- D. CH3OH E. CH3NH3+ correct answer: E. CH3NH3+ A molecule of acetonitrile CH3Ch2Ch contains ____ sigma bonds and ____ pi bonds correct answer: 8 sigma 2 pi Which acid forms a weaker conjugate base? A. H3COOH B. H3CNH3 correct answer: A. H3COOH Which molecule listed below is a polar molecule? A. NH3 B. H2O C. HCN correct answer: A. NH3 B. H2O C. HCN Which of the following pairs of bases lists the stronger base first? A. I- > Cl- B. CH3Coo- > HO- C. H2N- > CH3COO- D. H2N- > CH3COO- E. H2) > HO- correct answer: D. H2N- > CH3COO- Identify the compound with the highest pKa. A. CH3NH2 B. CH2OH C. H2O D. CH3NH3+ E. CH3COOH correct answer: A. CH3NH2 How many tertiary carbons are present in 2,4-dimethylhexane? A. 6 B. 2 C. 0 D. 8 E. 1 correct answer: B. 2 When methanol (CH3OH) acts as an acid, its conjugate base is...? A. CH4OH B. CH4O+ C. CH3OH2+ D. CH3O- E. -CH2OH correct answer: D. CH3O- What orbitals overlap to create the C-H bone in ethyne (HC=-CH) A. s-sp B. s-sp3 C. s-p D. p-p E. s-sp2 correct answer: A. s-sp Draw the lewis structure for H3O+. what is the hybridization on the O atom? A. sp3d2 B. sp3 C. sp3d