Which type of change does the statement describe? Particles rearrange into new
combinations, forming new
substances.
There is no change in the chemical
properties of the substance.
Particles retain their composition
and identity.
The chemical properties of the
substance change.

a. hope i'm right

explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

i believe it is c.) 1575 j.

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.