Which type of property can be observed only by changing a substance into a different substance? OA. ntensive property
OB. extenslve property
OC. physical property
OD.
chemical property

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.