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39 Which Kelvin temperature is equal to 200.°C?
(1) 􏰁73 K (3) 200. K (2) 73 K (4) 473 K
40 A 10.0-gram sample of H2O(l) at 23.0°C absorbs 209 joules of heat. What is the final temperature of the H2O(l) sample?
( 2) ( 4)
43 Which formula represents an unsaturated hydrocarbon?
HH HH
H C C H H C C OH
HH HH ( 1) ( 3)
HHO
H C C H H C C H HH
Sample Regents Questions
(1) 5.0°C (3) 28.0°C
(2) 18.0°C
(4) 50.0°C
41 Given the equation representing a system at equilibrium:
H2O
AgCl(s) ↽􏰂􏰂􏰂􏰂􏰂􏰂􏰂⇀􏰂 Ag􏰀(aq) 􏰀 Cl􏰁(aq)
When the concentration of Cl􏰁(aq) is increased, the concentration of Ag􏰀(aq)
(1) decreases, and the amount of AgCl(s) increases
(2) decreases, and the amount of AgCl(s) decreases
(3) increases, and the amount of AgCl(s) increases
(4) increases, and the amount of AgCl(s) decreases
P.S./Chem.–June ’13
[6]
June 2013 #41
Answer
( 2)
( 4)
Choice #1
Explanation: When the concentration of Cl increases, the reaction shifts to the left, the concentration of Cl decreases, and on the other side, AgCl’s concentration increases.
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