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

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Compounds

Classifying compounds

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

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?

none of these

3. 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 10⁵

2 x 10⁶

1 x 10⁶

2 x 10⁵

1 x 10⁵

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?

none of these

5. The compound SF₄ is a corrosive gas that attacks glass. Seven molecules of SF₄ contain a total of how many atoms?

6. In four molecules of sulfuric acid, H₂SO₄, there are:

	8 H atoms; 4 S atoms; 16 O atoms.		16 atoms total
	2 H atoms; 1 S atom; 4 O atoms.		4 H atoms; 4 S atoms; 4 O atoms.
	4 atoms total.

General Chemistry Online! Quiz: Interpret formulas