Calculate the δhrxn for the following reaction:
ch4 (g) + 2cl2 (g) --> ch2cl2 (g) + 2hcl (g)
use the following reaction and given δh's:
ch4 (g) + cl2 (g) --> ch3cl (g) + hcl (g), δh = -99.60 kj
ch3cl (g) + cl2 (g) --> ch2cl2 (g) + hcl (g), δh = -105.8 kj

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)