Cuando se tienen 6,023 x 1023 Moléculas de sulfato de cobre (CuS04)), se tienen 159,54 gramos ¿Cuántos gramos habrá en 0?2 x10 23 moléculas?

Can you guys me with question no. 5!

Describe the interaction that occurs between two objects with the same electrical charge.

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