__Fe + ___ Cl2 --> ___FeCl3 The coefficient on iron for this equation is:

A 4
B 2
C 1
D 3

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

What are the first three quantum numbers for the electrons located in subshell 2s?

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi