4. A 120.0 mg sample of a lead acetate hydrate, Pb(C2H3O2)2 × xH2O was heated to drive off the waters of hydration. The cooled residue had a mass of 103.0 mg. Calculate the value of x in the chemical formula. Show your work with Equation Editor.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth