The fill in the blanks and question 1 i'm really unsure about can some one me.

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

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

Which diagram represents the phase tha occurs after a solid melts?