Which of the following is an example of conservation of mass?

a. mass before = 3g mass after = 3g
b. mass before = 4g mass after = 3g
c. mass before = 6g mass after = 12g

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

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

All motion is caused by force? true or false