(A) 925,000 J
(B) 29,000 J
(C) 1,850 J
(D) 296 J
(E) 100 J
31 . If electricity costs 10 cents/coulomb, which of the following would have the highest
cost/mole?
(A) Copper from CuSO 4
(B) Sodium from NaCl
(C) Chlorine from KCl
(D) Hydrogen from H 2 O
(E) Iron from FeCl 332 . What volume of water would be needed to dilute 50 mL of a 3 M HCl solution to 1 M?
(A) 25 mL
(B) 50 mL
(C) 75 mL
(D) 100 mL
(E) 150 mL33 . If the pressure of a gas sample is doubled at constant temperature, the volume will be
(A) 4 times the original
(B) 2 times the original
(C) 1/2 of the original
(D) 1/4 of the original
(E) 1/8 of the original34 . Which of the following molecules has a trigonal pyramidal geometry?