56. Explain Why is the chemical composition of
water (H2O) always the same?

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

i think that the answer is c

the right answer is c i just did the question.