Lab 3: Density Purpose To determine e density of objects. Introduction vary with differme hand volume. Mass and volume are physical properties of matter and may the same material yet for one piece to be bigger than the other. If the first piece of metal is twice mass and volume when his hell both pieces of metal are made of the same material the ratio of the is ofvenne density (o) as the ratio of the mass of an object to the volume of mass divided by volume such as grams per centimeters cube (9/cm ) or kilograms per liter Sample Problem #1 A block of wood has a mass of 8 g and occupie a volume of 10 cm'. What is its density? Solution The density will be 10car = 0.8g/ cm' This means that every centimeter cube of this wood wil have a mass of 0.8 grams. same material will have the same density. Because of this the density is often used to identify ubstances are given in Table 1. Table 1. Density of solid (left) and laud Liquids tonicances Densities are in grem'. Mercury Water 30 - 284 Olive Oil Pine Sample Problem #2 A block of wood has a mass of 4 g and occupies a volume of 5 cm'. What type of wood can it Solution The density will be #2 = 0.8g/cm'. From Table 1 the only wood with that density is Oak. he object is greater than the density of the liquid, the object will eat on a liquid. If the density of their density is less than 1.00 gicm', but only Elm and Pine will float float in a solution of Alcohol. Part 1: Densities of Regularly Shaped Objects Use the following information to complete Table 2. Table 1 will help you to identify the objects Cube: side length = 3.2 cm, mass = 256.6g Cylinder: Diameter = 2 cm, height = 9 cm, mass = 22.3 g ere: Diameter = 2.5 cm; mass = 68.8 9 Sphere Cube Cylinder V-R. R V-L W.H V - X . R . H Table 2 JInteri V/Cope Mass () Volume (ema) Peta Composition Sphere Part 2: Densities of mystery objects novancy/density en.html en.html 1. Click reset button, 5. Measure the mass and volume of each object 4. Determine the density of each mystery object the maty each object using the density table in the animation (clock on Show Table to see able 3: Determination of densities of Unknown materials material mass ( kg) volume () Note: 1 kg = 1000 g. 1 L = 1000 cm' Lobb ( 1 3 Part 3: Density of a liquid the table at the toyoume of the clear liquid sample in one of the graduated cylinders on the table at the front of the lab room. Use an identical, empty graduated cylinder to find the volume of the liquid right off the cylinder. The cylinder is graduated in mililiters (mi) which are nevermin determine the composition using the table at the introduction able 4 (pre-recorded) Mass (g) Volume (cms) Density (g/em3) Composition 10 Discussion & Conclusions mate confident are you in your determination of composition of the . In a real experiment, what could be possible so out such an experiment? rces of error in carrying . Which of the mystery objects from part 2 will float in the liquid of part 3