I am very confused with the procedure to find the empirical formula. In the part where we have to multiply by subscripts to make them integers, are there clear rules?
For example, if I have the formula (I don't know if it exists in reality) $$C_{2}H_{3.75}O_{1}$$
In this case, it seems that I have to multiply by 4 and it would be:
$$C_{8}H_{15}O_{4}$$
But, if I work with more or fewer digits, I could end up with something like this: $$C_{2}H_{3.60}O_{1}$$
and I should multiply by 5: $$C_{10}H_{18}O_{5}$$
So which one is correct? And another question is when can I just approximate and not multiply by an integer? Are the empirical formulas we find only probable? Is there a way to verify the empirical formula?