solution contains $75\%$ of ethanol $($CH&O$)$ by mass and the rest is water.a$.$ What is the density of the solution if there is $15$ mol of ethanol per liter of solution?b$.$ To prepare a $3\mathrm{.}5$L of $2$M ethanol, how many milliliters of the solution is needed?c$.$ After preparing the solution in question $($b$),$ teacher want you to dilute the solution to $5$ times, $10$ times and $50$ times. How do you prepare those solution?