1. Which of the following air pollutants combines with haemoglobin in our blood and renders it incapable to transport oxygen within our body?
a) Carbon dioxide
b) Carbon monoxide
c) Oxide of sulphur
d) CFCs

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume