Which statement correctly describes a chemical reaction?
a. reactants come out of a reaction.
b. energy is always released.
c. bonds between atoms break and new bonds form.
d. products go into a reaction.

What element breaks down into yttrium-90?

What is the overall order of reaction for rate = k[no]2[o2]

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.