What would be the total mass of the products of a reaction in which 10 grams of water decomposes into hydrogen and oxygen (and no the answer isn't 10 each lol)

I know that you already said the answer isn't 10, but according to all rules in chemistry, the main one being the law of conservation of mass, the only possible answer here is 10.

Ithink the answer is 56.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.