Hottest Cities in United States. Two major cities contend for the title of hottest city in the United States. The city that comes out on top depends on how you measure heat. Phoenix Arizona excels at extreme hot weather. It consistently ranks number one for the most days a year when temperatures rise above 89 Â°F or 99 Â°F. Miami challenges Phoenix for top spot on hottest year-round temperatures.
would a chemist most likely study: a leaf changing color in the fall. OR. a leaf floating on water. Follow.
1 Organometallic chemistry â the study of chemical compounds containing bonds between carbon and a metal. 2  Polymer chemistry â the study of the chemistry of polymers.  Physical organic chemistry â the study of the interrelationships between structure and reactivity in organic molecules.