A mole of a certain compound always contains 6.023 x 10 23 molecules (avogadro's number), this way if we divide the amount of molecules in the compound (X and Y) by that number we can obtain the number of moles of that certain compund. With that we can obtain the molar fraction by dividing the amount of moles of the compound by the total of moles present on the solution (which is the sum of both moles' compounds).
We can calculate the amount of each molecular weight by first dividing the total weight of the solution by the total amount of moles and then multiplying by the previously calculated molar fraction of each compound (assuming you don't use percentages).
Hope this helps.
We can calculate the amount of each molecular weight by first dividing the total weight of the solution by the total amount of moles and then multiplying by the previously calculated molar fraction of each compound (assuming you don't use percentages).
Hope this helps.