Acidic rain, snow, fog, and cloud vapor typically have a pH of ____.
A. about 7.0
B. 5.7 to 6.2
C. less than 5.6
D. about 6.6
E. more than 7.6
Answer: C
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A vibrating system with a high frequency has a
A. short wavelength. B. short period. C. both of these D. none of these
If DNA is described as resembling a ladder in structure, the "sides" of the ladder consist of ________ and the "rungs" of the ladder consist of ________.
A. sugar and nitrogenous bases; phosphate B. sugar and phospholipids; nitrogenous bases C. sugar; phosphate D. sugar and phosphate; nitrogenous bases
What numeric data type will you use to store values like 321456, 678456, and 912567?
A. Double-precision float B. Single-precision float C. Long integer D. Short integer
How many stereoisomers are possible for 3-ethyl-4-methyl-2-hexanol?
A) 2 B) 4 C) 8 D) 16