I have had other things to do for the past couple of days so we never finished your last question.

It is important you answer questions here and attempt the part suggested, which you did not do.

The only purpose of our input is to help you so if you do not cooperate little progress will be made.

I would start this question as follows

You are asked both the mass and number of moles of ethanol so you can work on either weight or numbers of moles.

Choosing numbers of moles

Let a be the number of grammes of ethanol and b be the number of grammes of methanol we have 2 unknowns.

So we require 2 equations connecting these to solve this question.

Which gives us one equation

a + b = 2.16 (grammes)

So we need one more equation

C2H5OH + 3O2 = 2CO2 + 3H2O

CH3OH + 3/2 O2 = CO2 + 2H2O

If you combine these (add them up) you will get a second equation.

(I suggest you double the second one to get rid of the fraction)

Then substitute the molecular masses of each substance to get a mass equation in grammes.

Finally multiply through by a suitable number to make the mass of oxygen equal to that stated (4.32g)

You will then have a second equation in a and b

Can you solve a pair of simultaneous equations?