Question 1

The names and chemical formulas of four substances are shown in the chart.

Which substance listed in the chart is made up of the most atoms?

Accepted Answer

Phosphoric acid

Answer

Carbonic acid

Answer

Nitric acid

Answer

Sulfuric acid

Question 2

A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown.

$CH_3C_4H_8COCH_3$

How many atoms of each element are in one molecule of 2-heptanone?

Accepted Answer

7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom

Answer

4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom

Answer

7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms

Answer

6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms

Question 3

Barium sulfate, $\mathrm{BaSO_4}$ , is a white crystalline solid that is insoluble in water. It is used by doctors to diagnose problems with the digestive system. Barium hydroxide, $Ba(OH)_2$ , is also a white crystalline solid and is used in wastewater treatment.

How many more oxygen atoms are represented in the formula for barium sulfate than in the formula for barium hydroxide?

Accepted Answer

2

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