1.Which Statement best describes the use of a catalyst in a fuel cell? A. It reduces waste
B. It lowers energy requirements
C. It reduces toxic exhaust
D. It increases reaction rates

What is the number of moles in 15.0 g ash3?

2. you__turn left on a red light if you are in the left-most lane of a one-way street, you're turning into the left-most lane of a one-way street, and no nearby sign prohibits the turn.

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves