Chemistry HELP!

Question

An empty beaker weighs 49.35g

a) When completely filled with water, the beaker and its contents have a total mass of 270.05 g. What volume does the beaker hold? Use d =1.00 g/mL as the density of water.

b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mercury is d =13.5 g/mL..

Answer 1

a. mass of water = total mass - mass of beaker=270.05 g - 49.35 g=220.7 g

density of water = mass/volume => volume = mass/density=220.7g/1.00g/mL=220.7 mL

 

b. mass of mercury=volume * density = 220.7 mL * 13.5 g/mL = 2,979.45 g

    total mass = mass of mercury + mass of beaker = 2,979.45 g + 49.35 g = 3028.8 g