Make the following conversions using the factor label method. a) 0.006 km to cm
b) 5.84 x 10' us to s
d) 19.1 m/s to mi/hr (1 mile = 1.609 km)

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Why is the melting of ice a physical change ?