NYU Chemistry Worksheet

Question 46 (1 point)Which of the following processes is exothermic?
sublimation of dry ice (CO2(s))
ionization of a lithium atom
breaking of a Cl-Cl bond
formation of ionic compound from its ions
Question 47 (1 point)
At 220°C the equilibrium constant for the following reaction is K = 0.33. Under
these conditions, if flask initially contains 0.42 bar of PCI5, 0.78 bar of Cl2, and no
PC13, determine the final partial pressure of chlorine at equilibrium.
PC13(g) + Cl2(g) = PC15(g)
Question 48 (1 point)
Balance the following chemical reaction using whole numbers:
– Ag(s) + _H2S(g) + – O2(g) → _ Ag2S(s) + _H20(1)
For the formulas, you can use plain text (e.g., Na2CO3).
Paragraph
В І
U
A
Ea
h
Question 49 (1 point)
How many atoms of oxygen are found in 0.0894 g of the nickel (II) sulphate
hexahydrate (NiSO4.6H20)?
2.05 x 1020 atoms
2.05 x 1021 atoms
2.20 x 1021 atoms
1.92 x 1021 atoms
Question 50 (1 point)
How many of the following molecules have sp2 hybridization on the central atom?
HCN SO2
OCI2
XeCl2
A/
Question 51 (1 point)
For the reaction of carbon sulfide with oxygen shown below, what happens to the
reaction when the equilibrium is disturbed?
CS2(7)+ 302(g) = CO2(g) + 25O2(g)
A Hº = -1104 kJ/mol
a) The volume of the container is increased
(shifts left/shifts right/no change)
A/
b) The pressure of oxygen is increased
(shifts left/shifts right/no change)
A/
c) Some carbon dioxide is removed
(shifts left/shifts right/no change)
A/
d) The temperature is increased (shifts left/shifts right/no change)
A/
e) The amount of carbon sulfide is increased
(shifts left/shifts right/no change)
A