A. 24.5 g of ammonia NH3 = how many moles of ammonia? .b How many molecules of ammonia is that from 22.a.?

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that

What is formed when amino acids form long chains or polymerize