multiple choice
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Question 11.2
Which one of the following does not occur as diatomic molecules in elemental form?
Bromine
Nitrogen
Hydrogen
Sulfur
Oxygen
Question 12.2
Sulfur forms an ion with a charge of _______.
+3
+2
-6
-2
+6
Question 13.2
Which species below is the nitrate ion?
NH4+
NO2-
N3-
NO3-
N3-
Question 14.2
The correct name for CCl4 is _______.
carbon chloride
carbon perchlorate
carbon tetrachloride
carbon tetrachlorate
carbon chlorate
Question 15.2
The correct name for Ni(CN)2 is ___________.
nickel cyanate
nickel(II) cyanide
nickel(I) cyanide
nickel carbonate
nickel(I) nitride
Question 16.2
What is the coefficient of O2 when the following equation is balanced?
C2H4O + O2 CO2 + H2O
3
4
5
2
1
Question 17.2
Which one of the following substances would be the product of this combination reaction?
Al(s) + I2(s) __________
AlI2
AlI
Al3I2
Al2I3
AlI3
Question 18.2
A certain element has three isotopes. The isotopic masses (amu) and abundances are: 159.37 (30.60%), 162.79 (15.79%), and 163.92 (53.61%). What is the average atomic weight (amu) of the element?
162.35
33.33
163.15
162.03
161.75
Question 19.2
Calculate the percentage by mass of hydrogen in PtCl2(NH3)2.
0.034
1.558
2.016
1.008
0.672
Question 20.2
How many grams of sodium carbonate contain 1.773 x 1017 carbon atoms?
6.066 x 10-5
1.517 x 10-5
1.011 x 10-5
3.121 x 10-5
9.100 x 10-5
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