An oxygen molecule at 25◦C has a speed of
about 678 meters per second. Express this
speed in miles/hour. (1 mi = 5280 ft)
1. 0.000659 miles/hour
2. 0.421 miles/hour
3. 0.000117 miles/hour
4. 2440000 miles/hour
5. 9780 miles/hour
6. 15200 miles/hour
7. 1520 miles/hour