Which is an example of a chemical change?
a. water evaporating from a puddle
b. cloth tearing when pulled
c. wood forming sawdust when cut
d. bread baking in an oven

The identities of substances are the same before and after which type of change

A250 g sample of water with an initial temperatureof 98.8 closes 6500 joules of heat. what is the finaltemperature of the water?

If you used the method of initial rates to obtain the order for no2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 m, 0.100 m, & 0.050 m no2.