HELP I NEED TO GET MY GRADES UP , I HAVE AN F IN SCIENCE PLEASE HELP

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1