Choose the aqueous solution with the highest vapor pressure. these are all solutions of nonvolatile solutes and you should assume ideal van't hoff factors where applicable.0.50 m c5h12o50.50 m c11h24o110.50 m c2h6o20.50 m c4h10o4they all have about the same vapor pressure.

They all have about the same vapor pressure.

Explanation:

The elevation of the vapor pressure is related to the elevation of the boiling point: for higher vapor pressure, the liquid will boils at a low temperature.

When a nonvolatile compound is added to the liquid, the boiling temperature increases, in an effect called ebullioscopy, and that difference of temperature can be calculated by:

ΔT = K*W*i

Where K is a constant for the liquid, W is the molality, and i is the van't Hoff factor, which depends on the dissociation of the compound.

i = dissociated particles/total particles

For the molecules compounds given, the ideal van't Hoff factor is 1.

The molality can be calculated by:

W = n1/m2

Where n1 is the number of moles of the solute and m2 is the mass of the solvent. In this case, all the solutes have the same number of moles for the same volume of the solution because they have the same concentration, so the change in temperature is the same for all of them.

Then, they all have about the same vapor pressure.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

fe 55.85 g/mol and h2o 18.02 g/mol.