Page 418 - Chemistry eBook

Each interval on the axis labeled “Potential
Energy (kJ/mol)” represents 10. kilojoules per mole. What is the activation energy of the forward reaction?
According to o molecules
(1) accept H􏰂 i (2) accept OH
48 When an atom decays, it beco
the Na-24 atom
(1) an alpha pa (2) a beta parti
Which balance fusion?
(1) 3 H → 3 He 1 2
(2) 235U → 231 92 90
(3) 21H 􏰂 21H →
(4) 235U 􏰂 1n
50 Which reaction energy per kilo
(1) 1n 􏰂 235U 0 92
(2) 2C􏰂H → 2
(3) C3H8(g) 􏰂
(4) NaOH(aq)
(1) 10. kJ/mol (3) 40. kJ/mol
(2) 30. kJ/mol
(4) 60. kJ/mol
Sample Regents Questions
42 Which condensed structural formula represents an unsaturated compound?
(1) CH3CHCHCH3 (3) CH3CH3 (2) CH3CH2CH3 (4) CH4
43 Which element reacts spontaneously with 49 1.0 M HCl(aq) at room temperature?
(1) copper Jan 2014 #(432) silver (2) gold (4) zinc
44 Given the balanced ionic equation:
Answer
92 0
3Pb2􏰂(aq) 􏰂 2Cr(s) → 3Pb(s) 􏰂 2Cr3􏰂(aq) What is the number of moles of electrons gained
Choice #1
Explanation: An unsaturated compound is either an alkene or an alkyne. Choice
by 3.0 moles of lead ions?
(1) 5.0 mol (3) 3.0 mol
#1’s molecular formula is C H , which fits into the alkene formula.
(2) 2.0 mol (4) 6.0 mol
48
45 What is the amount of heat energy released when 50.0 grams of water is cooled from 20.0°C to 10.0°C?
(1) 5.00􏰁102 J (3) 1.67􏰁105 J (2) 2.09􏰁103 J (4) 1.13􏰁106 J
n
􏰀
m
r c
􏰂
T
→
g
→
5
􏰂
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