How many grams of ethane gas (c2h6) are in a 12.7 liter sample at 1.6 atmospheres and 24°c? show all work used to solve this problem.

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