How many different types of resonance structures can be drawn for the ion SO32- where all atoms satisfy the octet rule?
A) 1
B) 2
C) 3
D) 4
E) 5
Question 2
The pH of an aqueous solution at 25.0 C is 10.55. What is the molarity of H+ in this solution?
A) 2.8 10-11
B) 3.5 10-4
C) 3.45
D) 1.1 10-13
E) 3.5 1010
Question 3
Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye. The frequency of this light is ________ s-1.
A) 4.688 1014
B) 4.688 105
C) 1.920 102
D) 1.920 1011
E) 2.133 10-15
Structures of the oral cavity, pharynx, and esophagus.
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