When 1.78 of a certain molecular compound X are dissolved in 85. g Oof g dibenzyl ether ((C,H,CH,),0), the freezing point of the solution is measured to be 0.9 °C. Calculate the molar mass of x.

When 30.8 g of a certain molecular compound X are dissolved in 85. g of benzene (C,H,), the freezing point of the solution is measured to be 3.5 °C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.

When 2.85 g of a certain molecular compound X are dissolved in 85. g of dibenzyl ether ((CH₂CH₂)₂O), the freezing point of the solution is measured to be 2 -1.2 °C. Calculate the molar mass of X. If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. X x10 Ś

when 7.94 g of xylene was added to 132.5 g of cyclohexane, the freezing point of the solution was -4.9 C. what is the molar mass of xylene?

3.What is the molality(m) of a solution made from dissolving 179g.of MgCl2 into 1.OOL of water?

2. The concentrated sulfuric acid that we use in the laboratory is 98.0% H¿SO, by mass. Calculate the molality and molarity of the solution. The density of the solution is 1.83g/mL.

Chemistry help with the following questions.

At 45 °C, a solution is prepared by mixing 48.0 g Na2SO4 with 240.0 g water. The vapor pressure of water at 45 °C is 71.9 torr. Assuming total dissociation of the salt, determine: (a) mole fraction of Na2SO4; (b) mole fraction of water; (c) vapor pressure of the solution. (molar mass, g/mol: Na2SO4= 142.04; water = 18.02) (a) XNa2s04 = (b) Xwater = (d) Psoln =

A 30.0 mL sample of this aqueous HX solution freezes at – 0.186 oC. What is the molar mass of HX?

4. A solution of HCl, 0.77% by weight, freezes at -0.805oC. Calculate the apparent molality and the apparent molecular weight of HCl.