A gem has a mass of 4.20g . When the gem is placed in a graduated cylinder containing 20.20mL of water, the water level rises to 21.80mL .
A graduated cylinder contains 155mL of water. A 17.0g piece of iron (density = 7.86g/cm3 ) and a 25.0g piece of lead are added. What is the new water level in the cylinder?