General Chemistry Online: Companion Notes: Compounds: Classifying compounds: Quiz: Interpret formulas

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Compounds

Classifying compounds

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1. 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?

2 x 10⁵

1 x 10⁶

2 x 10⁶

5 x 10⁵

1 x 10⁵

2. Phenylmercuric borate, (C₆H₅Hg)₂HBO₃, was once used as a mildewproofing agent. A wood sample sprayed with 4.8 x 10¹⁸ molecules of phenylmercuric borate could contain how many mercury atoms?

9.6 x 10¹⁸

4.8 x 10¹⁸

2.4 x 10¹⁸

none of these

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

none of these

2:3

3:2

2:1

1:2

4. How many atoms are in two molecules of blood sugar (C₆H₁₂O₆)?

none of these

5. 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

6. The compound SF₆ is a colorless, odorless, extremely heavy gas, about 5 times as dense as air. A sample of 100 molecules of SF₆ contains

6 S and 6 F

600 S and 600 F

1 S and 6 F

100 S and 600 F

General Chemistry Online! Quiz: Interpret formulas