Lab03-Density 1-06ejm

Lab03-Density 1-06ejm - Name_Erica Murray_ By Dr. Adams...

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Name________Erica Murray________ Lab 3-Density (10.0 points) By Dr. Adams (1-06 edit.) The Density of a sample is determined by dividing the sample’s mass by the sample’s volume. Although there is a difference in a samples mass and weight, in this laboratory exercise we will consider them to be identical values. The abbreviation for Density = D, the abbreviation for mass = M and the abbreviation for volume = V. The formula for Density is: D = M/V In this laboratory exercise you will determine the Density of samples of matter using different techniques. In all laboratories it is important to use correct units and the correct number of significant figures. When in doubt, you will need to review these rules or ask for help from your instructor. Section A- Measuring Density from Dimensions. Find in your lab box a small baggie with a cylinder and die (rectangle) inside. Return these items to this baggie and replace back in your lab box at the end of this lab. Remove the rectangle you have been provided. It is a die. To determine the volume of a square you need to know the height, width and length of the square. Set the die on a table and use a metric ruler to measure its height, width and length. Measure each dimension to the nearest 0.1 cm. Metric rules are marked in centimeters. The smallest little lines are 0.1 cm apart. The mm are the smallest units on the metric ruler. For perspective, 2.54 cm = 1.00 inch. Record your data including the proper unit(s) (mm, g, lb, mL, etc.) in DATA TABLE 1. Each measurement or calculation in this exercise has a unit or units associated with the measurement. The volume of a cube can be determined by using this formula; Volume = (height)(width)(length) DATA TABLE 1 (include units) Die a) height ______1.5____cm b. width ______1.5____cm c. length ______1.5____cm d. Volume ______3.4____cm 3 e. mass ______5.7273____g f. Density ______1.7____ g/cm 3 Show below your calculations for the determining the volume of the die. Start with the formula you used, then plug the data into the formula. Be sure to show units and significant figures. Then perform the calculation and show your final answer with the correct unit(s) and significant figures. Also report your answer in DATA TABLE 1. V=LWH
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V=1.5cm*1.5cm*1.5cm=3.375 V= 3.4 cm 3 Next use your balance to determine the mass of the square. Turn on the balance if needed. When the scale is ready for use, press the zero (or tare) button if the empty scale does not read zero. Once the scale reports a mass of zero, add the square to the scale and record the mass of the square in grams. Always report the last digit even if it is a zero. The abbreviation for grams = g. Remember to report all significant figures from the scale even if the last digit is a zero. Record the mass in DATA TABLE 1. Now determine the density of the square.
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Lab03-Density 1-06ejm - Name_Erica Murray_ By Dr. Adams...

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