The oxidation number of bromine in bromine gas is . A. 0 B. +1 C. –1 D. –2

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.