Question

) The mont important characteriotic of catbon atoms for forming onganic molenuks a A) ability to form multiple covalent bonds B) ability to bond together to form long chains C) use of hybrid orbitals D) A and B 21) Nitric enide reacts with oxygem to form nitrogen dioxide What is Ke for the M, and N02 is 0.530 Mat25 'C? reverse reaction if the equilibrium concentration of NO is 0.300 M,O2 is 0.200 C)156 if D) 00641 A) 0.0340 B) 0624 22) What is pencent A)50% fhe pencent dissociation of acetic acld if the solution has a pH- 474 and apks-474 D)10% B)100% Q1% 23) Which structure is 1,A-dibromobenzene? Br Br rv) C)structure Ⅲ D) structure I 24) Sodium reacts violently with water according to the equation 2Na() +2 H200) → 2 NaOH(ag) + H2(g) The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of Aff and AS for this reaction? A) AF is positive and AS, is negative. C) AH is positive and AS" is positive. B) AHP is negative and AS is negative D) is negative and AS. is positive. 25) which of the following condensed structures represent the same molecule? CH3 CH3 CH CH2CH3 (IV) CH3 A) 11 and Ⅲ B) lI and IV C)Ill and Ⅳ D) 1 and II

Answer 1

Answer 20) c) use of hybrid orbitals

Answer 21)  

LNOJe Co. 530 -0.0640± O. 064

Answer 23) a) structure IV

Answer 25) c) III and IV