Potassium Chlorate (Used in Fireworks, Flares, and Safety Matches) Forms

question 58

Multiple Choice

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO₃(s) → KCl(s) + O₂(g) [unbalanced]
What mass of oxygen gas is formed if 26.4 g of potassium chlorate decomposes completely?

• A) 223 g
• B) 99.1 g
• C) 10.3 g
• D) 6.86 g
• E) 4.60 g

---

Definitions:

Paranasal Sinuses

Air-filled spaces located within the bones of the skull and face, connected to the nasal cavity, that help humidify and filter air.

Cilia

Microscopic, hair-like structures that protrude from the surface of many cells, involved in movement and sensory functions.

Pharynx

The muscular tube that connects the mouth and nasal passages with the esophagus.

Tidal Volume

The amount of air that is inhaled or exhaled in a normal breath under resting conditions, important in respiratory physiology.