What mass of 1,1 dichloroehtane must be mixed with 100g of 1,1 to give a solution with vapor pressure 157 torr at 25 c

This is an incomplete question.

The complete question is:

1,1-dichlorotetrafluoroethane, CF3CCL2F, has a vapor pressure of 228 torr. What mass of 1,1-dichloroethane must be mixed with 100.0 g of 1,1-dichlorotetrafluoroethane to give a solution with vapor pressure 157 torr at 25 degrees celsius?

46.9 g of 1,1 dichloroethane must be fixed with 100 g  of 1,1 dichlorotetrafluoroethane to give a solution with vapor pressure of 157 torr at

Explanation:

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

where,

= relative lowering in vapor pressure

i = Van'T Hoff factor = 1 (for non electrolytes)

= mole fraction of solute  

=

Given : x g of solute is present in 100 g of solvent

moles of solute (1,1 DICHLOROEHTANE) =

moles of solvent (1,1 DICHLOROTETRAFLUOROEHTANE ) =

Total moles = moles of solute  + moles of solvent =

= mole fraction of solute   =

Thus 46.9 g of 1,1 dichloroethane must be fixed with 100 g  of 1,1 dichlorotetrafluoroethane to give a solution with vapor pressure of 157 torr at

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

explanation: