Toluene, c7h8, has both a higher vapor pressure than water at 25 ã‚åÿc and a higher normal boiling point. which statement best explains these observations? (a) liquids with higher vapor pressures typically have higher boiling points. (b) toluene has a higher molar mass than water. (c) toluene has a lower heat of vaporization than water. (d) the density of toluene vapor is greater than that of water vapor.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o