How many moles are there in 3.9 grams of potassium

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

Which statement can best be concluded from the ideal gas law?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.