A system had 162.27 kJ of work done on it and its internal energy increased by 57.12 kJ. How much energy did the system lose as heat?

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

How many grams of n2h4 will be consumed by 23 g of n2o4

Compare and contrast physical changes with chemical changes.