26. Which one of the following is most likely to be a 30. In the quantum mechani

Question

26. Which one of the following is most likely to be a 30. In the quantum mechanical atom, which one of the following orbitals cannot exist? frontier scientific idea? a) 1p a) Astrology. b) 2p (b) An accepted by almost all scientists. c) 3p c) F m-a. d) 4d (d) A new idea undergoing extensive research. e) 5S (e) An idea proposed in 1851 that attracted much 31. The concentration of gold in seawater is 5.0x10 interest, but which is now discredited gold. What mass of seawater is required to be able to 27. How many N atoms are there in one formula unit of extract 1.0 g of gold? ammonium nitrate? a) 5.0x10 g b) 50 g (b) 2 (c) 2000 kg d) 2.0x104 kg e) 2.0x1 kg 32, which one of the following is exothermic? 28. What is the next highest potential energy orbital after the 4p orbital? (a) soup boiling on a stove. a) 3d (b) After a hot shower, H20 (g) in the air forms liquid water on cold window glass. b) 4s (c) silver is melted before pouring it into a mold at a c) 4d ewelry store d) 4f A cold-pack given by a doctor is activated and (e) 5s becomes cold. (e) cold milk warms to room temperature after it is removed from the refrigerator. 29. Which one of the following statements about potential and kinetic energy is false? (a) l stretch a spring. When I let go of one end 33. what is the correct fully-balanced equation for potential energy turns into kinetic energy. reaction of nitrogen and oxygen gases to make (b) The gravitational potential energy of a student at dinitrogen pentoxide gas? the top of a staircase is greater than at the bottom (a) N2 (g) O2(g) Nso2(g) of the staircase (b) Niz(g) 5 oz(g) N20s(g) (c) some chemical reactions release stored chemical (c) 2 N(g) 5 oz(g) N20s (g) potential energy. so they (d) Two oppositely charged particles placed touch have a minimum amount of electrostatic d) 2 N2(g) 5 oz(g) 2 N20s(g potential energy. bridge. At 34. (e) A person makes a bungee jump from a ground the instant the person is closest to the Predict the products of the double-displacement reaction between aqueous nickel sulfate and aqueous potassium sulfide. their kinetic energy is maximum. a) Nis(s) and K2So4 (aq (b) Nis(aq) and K2Soalaq) c) Nis (aq) and K2Soals d) Niso4(aq) and K2S(aq e) Niso3(aq) and K2S (s Page 4 of 8

Explanation / Answer

26) C
27) B
28) e
29) E
30) D
31) C
32) ...
33) D
34) A

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