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Question 15 (4 points) We cannot effectively clean nonpolar substances from our hands or clothing with water alone; we must add soap or detergent. The structure of a typical soap molecule is shown below. Which region of this molecule would dissolve in a nonpolar substance such as grease? Region 3 H HH HH HH HH HH HH H H H O H O Nat H HH HH HH HH HH HH H H H Region 4 Region 1 Region 2 Region 1 Region 2 Region 3 Region 4