A paper published in the research journal Science in 2007 (S. Vallina and R. Simo, Science, Vol. 315, p. 506, January 26, 2007) reported studies of dimethylsulfide (DMS), an important greenhouse gas that is released by marine phytoplankton. This gas “represents the largest natural source of atmospheric sulfur and a major precursor of hygroscopic (i.e., cloud-forming) particles in clean air over the remote oceans, thereby acting to reduce the amount of solar radiation that crosses the atmosphere and is absorbed by the ocean.”
(a) Sketch the Lewis structure of dimethylsulfide,CH₃SCH₃, and list the bond angles in the molecule.
(b) Use electronegativities to decide where the positive and negative charges lie in the molecule .Is the molecule polar?
(c) The mean seawater concentration of DMS in the ocean in the region between 15° north latitude and 15° south latitude is 2.7 nM (nano molar). How many molecules of DMS are present in 1.0 m³ of seawater?