Hello , I have recently done to mock papers for my chemistry exam and on both exams I had questions involving balancing equations but with diatomic molecules in them .
Q1. NaBr = Na + Br ?
I thought the equation was already balanced but apparently the correct answer was
A. 2Nabr = 2Na + Br2
- I thought this was due to Br being a diatomic molecule..
Q2. CaCl2 = Ca + Cl?
I thought that once again the question was already balanced because Cl is a diatomic molecule .. so there should be the same amount on both sides.. but the answer was
A. CaCl2 = Ca + 2Cl
Please help me understand how this has happened? whats really confusing me is that in the first question, even without the subscript there you still count the Br as Br2 but in the second question it expected me to put a coefficient 2 there..