19) You place a 28.95 g piece of gold in a 10 mL graduated cylinder. The level of the water rises 1.50 mL. What is the density of gold? You know that silver has a density of 10.5 g/cm3. What mass of silver will raise the level of the water in the graduated cylinder 1.50 mL?

Question

19)	 You place a 28.95 g piece of gold in a 10 mL graduated cylinder. The level of the water rises 1.50 mL. What is the density of gold? You know that silver has a density of 10.5 g/cm3. What mass of silver will raise the level of the water in the graduated cylinder 1.50 mL?

Vocaloid · Answer

density = mass/volume

using archimedes' principle, the weight of an object is equal to the volume it displaces (or in other words, the difference in the liquid's volume before and after the object is submerged)

so, using the gold, the water rises 1.50 mL which means the volume of the gold is 1.50 mL. 
you also have the mass of the gold (28.95g)

therefore, use density of gold = mass of gold/volume of gold

Vocaloid · Answer

similar logic with the silver, except you're given density and volume, and you're asked to solve for mass

density of silver = mass of silver/volume of silver

plug in the appropriate values from the problem, solve for mass