<h2>IM SORRY I CAN'T UNDERSTAND YOUR QUESTION PLEASE TRY AGAIN PLEASE DONT REPORTED MY ANSWER THIS IS FOR MY FAMILY MY SARV AND SELEVER</h2>
Answer: I'm in no way like an expert but I've heard water goes from an elevated area to a lower area. So it should be arrows that start at a more elevated to less elevated. Like white to brown, and orange to yellow, and stuff like that. I hope that helped? Anyway, have a lovely day!
Explanation:
Answer:
the mass number is 40 g/mole
