Question

___H2O2 =___H2O + ___O2

Answer 1

Look at the table. Notice how you have 3 oxygens on the product side and 2 on the reactant side? Play with the numbers around until you get a both numbers on both sides the \(\sf \color{red}{same}\)
Also, it follows distributive property (from algebra). For instance, if you have NH\(_3\), you have 1 nitrogen, and 3 hydrogens. BUT and you add a 2, to get: \(\sf \color{red}{2}\)NH\(_3\), what you get is actually TWO nitrogens, and SIX hydrogens!

Just remember.