Which of these represents the release of chemical energy?

a. pouring gasoline into a tank
c. a toy car running down a ramp
b. burning charcoal in a grill
d. warming food in a microwave

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

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.

How to convert a density of 0.791g/cm3 to lb/ft3