Two chromosomes is correct
Velocity is how fast the river is moving, the Volume is how much is in the river!
I think the answer is ozone i hope i am right and hope this helps
Answer:
early all of the hydrogen consumed in the United States is used by industry for refining petroleum, treating metals, producing fertilizer, and processing foods. U.S. petroleum refineries use hydrogen to lower the sulfur content of fuels.
Explanation: