Air is made of seperate molecules of oxygen, nitrogen, and carbon dioxide. is the air a pure substance or a mixture? explain.

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Using data from seismic waves, geologists have learned that earth’s interior is made up of several