8. N. +20, NO. 4 moles of oxygen react with excess nitrogen. What is the maximum number of moles of dinitrogen
tetroxide (N-O:) that can be produced?

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Can someone me with these questions plz.

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d