TIMED QUIZ NEED HELP PLEASE!!​

Need on both questionswill markbr />

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

Which formula can be used to calculate the molar mass of hydrogen peroxide