How does the density of an object help scientist understand the natural world

Easy definition for atom and atomic mass

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.