Question

In this equation what should be the coefficients of the reactant and products I2+O2->i4O9

Answer 1

The correct answer is C.

For the equations to be balanced, the coefficients must make the number of atoms of the reactants and products the same across the equation. The other answer options leave the reactants having too many atoms and the product lacking. So the only properly balanced option is answer choice C.

So the completed balanced equation is:
4I2 + 9O2 -> 2I4O9

I hope this helps! :)