Một hợp chất hữu cơ gồm c h o, c chiếm 61.22%

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

Nonpoint source pollution is difficult to control because it

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit