Compared to the freezing point and boiling point of water at 1 atmosphere, a solution of a salt and
water at 1 atmosphere has a

A. lower freezing point and a lower boiling point

B. lower freezing point and a higher boiling
point

C. higher freezing point and a lower boiling
point

D. higher freezing point and a higher boiling
point

the product of the pressure and volume is also constant

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