6.0m(mol/kg) of HCl
125mL H2O = 0.125kg
6mol/kg = n mol/0.125kg, n = 0.75mol
When 0.75mol of HCl reacts, 0.75/2=0.375mol of H2 is produced. H2 = 2g/mol
So, 0.375mol H2 = 0.75g
Your answer is 3.25 moles of Bromine
I remember this from a week ago. The answer was topex/poseidon
Ionic reaction when a metal and non metal are together a molecule is when a metal abs metal react hope this helps
30% should be the percentage of oxygen if the total mass of fe2o3 is 160.