needing help with number 70, feel like I don't have all the pieces of info answer the question

Cakculase the vapor prrssure ar 25C of henune absie the solution. The vapor prescute of pore bexume at 25 'c is 151 fort. 69. A salution contains 50.9g od heptane (C11ti) and 50.0 ge of octane (C9H1a) at 25C. The vapot presates of part heptane and pute octanc at 25C are 45.8 tott and 10.9 tutt, tespectrely. Acsuming ideal behavioc, answet cach questinth a. What is the vapor pressure of eacb sohatioe cainpoenent in the mixiure? b. What is the wotal pee sare aticuve the solutinn? c. What ts the componition of the vapot in mas percent? 4. Why is the compession of the sapet difirtake feam the compposition of the motution? 70. A solution contains a misfure of pecatint and hesane at fiken temperatare. The solution has a vapie pre-sute of Ated bot. Pore pentane and hexane bave sapee presurrs al 425 terr and 151 torf, respectively, at toom temperatate. What is the mole fraction composition of the mberure? (Asuame Meal behaviar.) 31. A solusion contains 4.08g of chlorolorem(CHfm) and 9.29g of acetone (CH3COCH3). The vapor presrare at 35 " C at peine chlorodorm and pure acctone are 295 torr and 312 torr, fespectively. Assuming ideal beluvior, calculate the vapar pressures of each component and the total vapore pressate above the salutiae The experimentally measured total vapor persare at the solution at 35C is 312 torr. Is the solution idcal? If not, what can you say abour the relasive strength of chlorolorm-acetone interactiont compared to the acetone-acctone and chlotoform-chlocofoem interactions? 72. A solueion of methanel and water has a mete fraction of water of 0.312 and a total vapot ptessure of 211 tert at 39.9C. The vapot pressures of pure methanol and pure aater at this temperature are 256 torr and 553 torr, nespectively. Is the scilution ideal? If not, what can yous say abouit the relative strengthes of the solote -iolvent interactions compared to the solute-solafe and solvent-eelvent inicractions? Preesing Point Depresston, Boiling Point Flevation and Ormos 73. A glacose solution contains 55.8g of glocose (C1H2Oe) in +55.8 of watet. Determine the freeting peint and bouling point of the solution. (Assume a dicmity of 1.00mml. for ater) 74. An ethylene glycol solutiot cotitains 21/2 of ethy iene slyciol (C2H4,O2) in 85.4mL of water. Determine the freetitgpoint and boiling point of tbe solution. (Assutae a density of 1.00g/ml for water, 75. Calculate the freezing point and mehing point of a soluson. containing 10,0g of naplithalene (C1H) in 100.0mL. of benzene. Benzenc hasa denvity of 0.877k/cm