To determine the ph of a solution using a ph indicator, you need a?
a. color key
b. neutral solution
c. range of acids and bases

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.

answer///carbon;