Seawater is mostly a solution of sodium chloride in water. The concentration varies, but marine biologists took a sample with an amount concentration of 0.56 mol/L. Calculate the mass of sodium chloride in the biologists 5.0L

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