Just like 1 't' and 1 'o' combine to form one 'to', $$1 \, \mathrm{gm}$$ of Hydrogen and $$8 \, \mathrm{gm}$$ of Oxygen combine to form $$9 \, \mathrm{gm}$$ of Water.
If we combine $$3 \, \mathrm{gm}$$ of Hydrogen and $$8 \, \mathrm{gm}$$ of Oxygen, what do we get?
• $$9 \, \mathrm{gm}$$ of Water only
• $$18 \, \mathrm{gm}$$ of Water only
• $$9 \, \mathrm{gm}$$ of Water and $$2 \, \mathrm{gm}$$ of Hydrogen