The mass of a piece of lead is the product of its volume and density. To find the mass of a 7.91 cm² piece of lead having a density of 11.34 g/centimeters cubed, we need to multiply these two values. We can use the following formula:
Mass=Volume×Density
We can plug in the given values and calculate the mass:
Mass=7.91 cm2×11.34 g/cm3
Mass=89.69 g
Therefore, the mass of a 7.91 cm² piece of lead having a density of 11.34 g/centimeters cubed is approximately 89.69 grams.