What happens to the molecules within a gas when the gas condenses?

What are the percent by mass of copper in penny lab

What diagram shows the ionic compound of magnesium oxide

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