When the mass of the boron atom is calculated, the mass of the electrons is ignored. Why is the mass of the electrons ignored?

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

__can be defined as which velocity changes

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.