9.The land area of Greenland is 840,000 mi2 with only 132,000 mi2 free of perpetual ice. The average thickness of this ice is 5000 ft. Estimate the mass of ice to two significant figures. The density of ice is 0.917 g/cm3.

Urea, co(nh2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by combustion of 1.00 x 104 grams of co2?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Define dew point. i am writing this part to be able to ask the question