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:

2.4 x 1019

0.9 x 1019

1.2 x 1019

4.8 x 1019

none of these

2. 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?

54

3

1

none of these

51

12

3. 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?

none of these

36

6

35

32

4. The number of carbon atoms in 5 molecules of oxalic acid, H₂C₂O₄, is

2

5

10

10

20

5. The total number of atoms in 10 molecules of CO₂ is:

10

20

3

30

none of these

6. The ratio of carbon to hydrogen in acetic acid, HC₂H₃O₂, is:

none of these

3:2

1:2

2:1

2:3




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General Chemistry Online! Quiz: Interpret formulas

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 02/23/18.URL: http://antoine.frostburg.edu/chem/senese/101/compounds/print-interpret-formulas-quiz.shtml