How much energy is released when the temperature of a 4.4 g piece of iron cools from 270oC to 32oC? (Specific heat of iron is 0.444 J /goC).

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

Compare and contrast physical changes with chemical changes.

Which statement describes james chadwick’s discovery.