The average speed of oxygen molecules at 690°C is 1.60 × 10⁵ cm/s. Which of the following calculations would convert this speed to units of miles per hour?
A) (1s/1.6 × 10⁵ cm) × (2.54 cm/1 in) × (1 ft/12 in) ×
(1 mi/5280 ft) × (3600s/1 h)
B) (1s/1.6 × 10⁵ cm) × (2.54 cm/1 in) × (12 in/1 ft) ×
(5280 ft / 1 mi) × (1 h/3600s)
C) (1.6 × 10⁵ cm/1s) × (2.54 cm/1 in) × (12 in/1 ft) ×
(5280 ft / 1 mi) × (3600s/1 h)
D) (1.6 × 10⁵ cm/1s) × (1 in/2.54 cm) × (1 ft/12 in) ×
(1 mi/5280 ft) × (3600s/1 h)
E) (1.6 × 10⁵ cm/1s) × (1 in/2.54 cm) × (12 in/1 ft) ×
(5280 ft / 1 mi) × (1 h/3600s)
Answer: D) (1.6 × 10⁵ cm/1s) × (1 in/2.54 cm) × (1 ft/12 in) × (1 mi/5280 ft) × (3600s/1 h)