I. Purpose The purpose of this lab is to determine the molecular mass of a volatile liquid. II. Procedure • Place a cork with a small hole in it inside of a test tube and find the weight of the two together using a sensitive balance. • Pour 0.5 mL of the unknown volatile liquid into the test tube‚ insert the cork‚ and place the tube into boiling hot water while keeping the cork above water level. As the gas evaporates‚ excess gas will be released throughout the whole in the cork. Keep the test
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Quarter|5.6|0.0056| 3 Pennies|7.5|0.0075| Pencil|5.9|0.0059| Volume Measurements and Density Measurements with liquids Water: Mass of empty graduated cylinder __16.7g Volume of water in graduated cylinder __5.0mL Mass of graduated cylinder and water __21.6g Net mass of the water __ 4.9g Density of the water __0.98g/mL Percent error ___2.0% Alcohol: Mass of empty graduated cylinder ____16.7g Volume of alcohol in graduated cylinder ____5.0mL Mass of graduated
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rectangular solid. 3. To determine the thickness of a piece of aluminum foil using the density concept. 4. To practice proficiency in performing the following experimental procedures: pippeting a liquid‚ weighing by difference‚ and determining a volume by displacement. Apparatus: Tall glass cylinder‚ glass marble‚ rubber stopper‚ cork‚ 125-mL Erlenmeyer flask with stopper‚ 150-mL beaker‚ 10-mL pipet‚ pipet bulb‚ 100-mL beaker‚ rubber stopper‚ unknown rectangular solid‚ aluminum foil ~10 x 10cm
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equals the derivative of the formula for the volume with respect to r because the total volume inside a sphere of radius r can be thought of as the summation of the surface area of an infinite number of spherical shells of infinitesimal thickness concentrically stacked inside one another from radius 0 to radius r. At infinitesimal thickness the discrepancy between the inner and outer surface area of any given shell is infinitesimal‚ and the elemental volume at radius r is simply the product of the surface
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mineral occupy a volume of 35.0cm3? b. 12.2g/cm3 3. The water level in a graduated cylinder stands at 20.0 mL before and at 26.2 mL after a 16.74 g metal sample is lowered into the cylinder. What is the density of the sample? c. 1.2 g/mL Safety: Used goggles. Materials: Triple Beam Balancer‚ Water‚ Beaker instead of graduated cylinder‚ solid metal block‚ and goggles. Procedures: | Observations | 1. Measure Mass using Triple Beam Balance | | 2. Measure Volume by using water
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objective of this lab was to determine the relationship (if any)‚ between the pressure and volume of a gas given the temperature and # of molecules remained constant. Using the Boyle’s law apparatus‚ and textbooks to demonstrate pressure it was concluded that there was a relationship between pressure and volume. However‚ the relationship was not a direct relationship‚ and it was determined that the pressure and volume of a gas are inversely proportioned. Thus‚proving Boyle’s theory correct. Introduction
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relative “heaviness” of objects with a constant volume. As defined‚ the formula for Density is Mass over Volume (ρ=m/v) and it can be rearranged to get the Volume (v=m/ρ) or Mass (m=ρv) of a certain substance. The objectives of this experiment are as follows: To learn the proper techniques in measuring weight and volume. To determine the densities of some solids and liquids. To apply the rules of significant figures when reporting the weight‚ volume‚ and density of each material. To apply
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team. c. What happened? Briefly give the result (or results) of the experiment in 1 sentence. We noticed the calibration marks on the beakers were taken only to be an approximate guide to volume because the marks were placed at greater intervals. This did not allow for precise measurements. The 25-mL volume dispensed by the pipet was much more precise than using the beaker and more precise than the graduated cylinder as well Pre-Lab: 1. Pipets used for the transfer of samples of aqueous
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pressure and temperature outside. [1] As the pressure on the object increases the volume of the object decreases and hence the density of the object increases. [1] On the other hand‚ as the temperature increases the volume of the substance increases and its density decreases. [1] The density of a substance can be found if the mass and volume of that substance are known‚ since the density is the ratio of the mass to its volume Density = The SI derived unit for the density is kg/m3. The mass of a substance
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slope for water and alcohol and apply the understanding to determine the volume of a quartz sample without measuring the volume or calculating it. Hypothesis: The hypothesis of this lab was by using the density of alcohol we could calculate the density of a quartz samples. Controls and Variables: Independent variable: Volume of water and alcohol Dependent variable: The weight of the liquid or solid Controls: The volume of the water should be the same each trial Materials: Triple Beam Balance
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