Question

c) HC d) CCl4 16. The hybridization of C in H-C N: is a) sp b) sp3d c) sp d d) sp e) sp 17. A triple bond consists of a) three sigma bonds one sigma and two pi bonds b) three pi bonds c) two sigma and one pi bond d) none of the above 18. What is the best bond angle for the C-O-C bond in the molecule shown below? a) 180° b) 120° c) 105° d) 90° e) 135° 19. What is the concentration of the solution prepared by diluting 0.200 L of a 2.00 M solution to a final volume of 0.800 L? a) 8.00 M b) 0.200 M c) 0.500 M d) 0.400 M e) 0.800 M 20. Calculate the number of moles in 38.4 g of C4H604 a) 3.08 mol b) 4.53 x 103 mol c) 0.325 mol d) 38.4 mol e) 2.31 x 1025 mol

Answer 1

H - c = N (a) Hybridization = Sp rightarrow 2 sigma bonds and 2 pi bonds A triple bond One sigma bond 2 pi bond M_1 v_1 = M_2 v_2 0.2 times 0.2 = M_2 times 0.8 (c) M_2 = 0.64/0.8 = 0.5 M 38-4g C_4 H_0 o_4 M.M = 48 + 6 + 64 = 118 g.mol (c) n = 38.4/118 = 0.325 moles