Why is the graphical method of determining density more reliable than the mathematical method for the determination of unknown substances?

Classify this reaction: 2al+n2-> aln.

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.