# Density Pre-Lab ```Density Lab Pre-Lab
Name
Period
1. Define density.
2. If a substance has a density of 8.56 g/cm3, will the substance float or sink in water? Explain.
3. A cylindrical substance was examined and the following data collected using a metric ruler and a centigram balance:
Diameter (cm)
2.30
Height (cm)
7.20
Mass (g)
210.40
a. Calculate the volume of the cylinder, given the equation for the volume of a cylinder is:
𝑉 = 𝜋(
𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟 2
2
) ∙ 𝐻𝑒𝑖𝑔ℎ𝑡
b. Calculate the substance’s density.
c. The substance is determined to be zinc, with a density of 7.14 g/cm3. Calculate the percent error of the
experimental density, given the equation for percent error is:
%𝐸𝑟𝑟𝑜𝑟 = (
|𝐴𝑐𝑡𝑢𝑎𝑙−𝐴𝑐𝑐𝑒𝑝𝑡𝑒𝑑|
𝐴𝑐𝑐𝑒𝑝𝑡𝑒𝑑 𝑉𝑎𝑙𝑢𝑒
) 𝑥100
4. A student team determined the density of a liquid three different times. The values were determined to be 2.84
g/mL, 2.85 g/mL, and 2.80 g/mL. The accepted density value is 1.3 g/mL. Are the values accurate? Are they
5. Graph the following information using excel. Plot a graph of mass (y-axis) versus volume (x-axis). Include a best fit
straight line through the points. Print your graph and staple it to the back of this worksheet.
Sample
1
2
3
4
5
Mass (g)
34.00
18.02
77.05
98.63
55.34
Volume (cm3)
4.74
2.49
10.8
13.9
7.70
a. Using 2 points from the line of best fit, calculate the slope of the line of best fit. Show your work and include