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Quiz: Interpret formulas
1. The deadly nerve gas tabun, (CH3)2NP(O)(C2H5O)(CN), was manufactured by the Germans in World War II but never used. A sample containing traces of tabun is found to contain 2.4 x 1019 nitrogen atoms. The maximum number of tabun molecules that the sample could contain is:
none of these1.2 x 10190.9 x 10192.4 x 10194.8 x 1019
2. Stearin, C3H5(C18H35O2)3, is a constituent of most animal fats and is used for making soap, candles, and candies. How many carbon atoms are in one molecule of stearin?
572124none of these18
3. The structures of the male and female sex hormones testosterone (C19H28O2) and estradiol (C18H24O2) are remarkably similar considering their profoundly different effects. Three molecules of testosterone contains how many more carbon atoms than three molecules of estradiol?
13none of these545112
4. Stearic acid, CH3(CH2)16CO2H, is the most common fatty acid occurring in animal and vegetable fats. How many hydrogen atoms does one molecule of stearic acid contain?
323635none of these6
5. In four molecules of sulfuric acid, H2SO4, there are:
4 H atoms; 4 S atoms; 4 O atoms.2 H atoms; 1 S atom; 4 O atoms.
8 H atoms; 4 S atoms; 16 O atoms.16 atoms total
4 atoms total.
6. Realgar, As2S2, is a soft red-orange mineral that was once used in colored fireworks. An explosion that releases a million atoms of arsenic could contain how many molecules of realgar?
5 x 1052 x 1062 x 1051 x 1061 x 105
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General Chemistry Online! Quiz: Interpret formulas

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 06/11/07.URL: http://antoine.frostburg.edu/chem/senese/101/compounds/interpret-formulas-quiz.shtml