Diethyl ether has a vapor pressure of 400.0 torr at 18°c. when a sample of benzoic acid (a non-volatile compound) is dissolved in ether, the vapor pressure of the solution is 342 torr. what is the mole fraction of benzoic acid in the solution?

Mole fraction of benzoic acid = 0.855

Explanation:

Vapour pressure of diethyl ether = 400.0 torr

Vapour pressure of the solution = 342 torr

When a non-volatile sotule is added to a volatile solvent, then vapour pressure of solvent decreases and vapour pressure of the solution is directly proportional to mole fraction of the solute.

P_total = Vapour pressure of the solution = 342 torr

x = Mole fraction of the solute

Mole fraction of benzoic acid = 0.855

one state would change   like louisiana to texas. thats a change

explanation:

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms