Asolid is added to water. the temperature of the water rises from 18°c to 22°c. what type of change does this indicate?

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

Why do cells appear different in distilled water than they do in 10% salt water?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer