How many moles of water are produced if 4.701x103 moles of oxygen completely react? A 4.071x103 Mol O2 B 2.351x103 Mol H2O C 4.071x103 Mol H2O D 9.402x103 Mol H2O

Answercanyon;

The answer would be 25.3

Bromine has atomic number  35  which means there are  35 protons  and  44  neutrons to give a total of 79 nucleons. the fact that it's a positive ion means that it has lost an electron; so there'll be  34 electrons. 

You can just look up the questions individually and get the answers