Which of these actions precedes a precipitation event A: clouds form
B: the air gets colder
C: the wind picks up speed
D: Raindrops are supercooled​

Compare and contrast physical changes with chemical changes.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.