The answer is Na-F. The F has highest electronegativity among these elements. So we need to find the element with smallest electronegativity. And this element is Na.
It would be the same thing if the Co does not have a number with it because it can’t reduce
Well people say the world's going to end soon so people need to find another planet to live on they're thinking about Mars at the moment
thx but it's actually 143
CH3CH2OH + 3O2 = 2CO2 + 3H2O
Basically you do trial and error on both sides so they can be equal
