Which of the following is not a potential sign of chemical change?
a. release of gas
c. change of color
b. evaporation of water
d. production of gas

Evaporation of water is not indicative of a chemical change, as it could be due to a physical change such as decrease in pressure or increase in temperature  due to heating.

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.