When dissolving a gas, as the temperature of a solvent increases, the rate of dissolution
a. increases.
b. decreases.
c. stays the same.
d. either increases or decreases, depending upon the liquid.

Option (A) is the correct answer.

Explanation:

When we increase the temperature of solvent then there will be increase in kinetic energy of molecules. As a result, molecules will move rapidly and thus, there will occur number of collisions between the particles.

Hence, rate of reaction will also increase that is, rate of dissolution will increase.

Thus, we can conclude that when dissolving a gas, as the temperature of a solvent increases, the rate of dissolution increases.

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