Question

Why do aton combine in a fixed ratio by weight?​

Answer 1

Answer:

I can't be too sure but I think that has something to do with the fact that only a limited number of atoms can combine with a central atom to form a compound.

Explanation:

For example, take water. Two hydrogen atoms combine with one oxygen atom to form H2O. One mole of water contains two moles of hydrogen and one mole of oxygen. And since a mole is a definedquantity and constant for every element, as a consequence, elements combine in a fixed ratio by weight

Answer 2

Answer:

please mark me brainliest

Explanation:

I can't be too sure but I think that has something to do with the fact that only a limited number of atoms can combine with a central atom to form a compound.

For example, take water. Two hydrogen atoms combine with one oxygen atom to form H2O. One mole of water contains two moles of hydrogen and one mole of oxygen. And since a mole is a defined quantity and constant for every element, as a consequence, elements combine in a fixed ratio by weight.

You might say, “Ugh, then why do only two Hydrogen atoms combine with one oxygen atom to form an H2O molecule?”

And I would say, “Because, it’s not like there can’t be more hydrogen or oxygen atoms but it won’t be water. There’s experimental evidence of that. So, when two hydrogen atoms combine with two oxygens the result isn't water but a peroxide molecule- H2O2.”