of NCS-would increase by 1 mL‚ test tube 5 received 5 mL of NCS. . The next step was adding HNO3 to each test tube in different volumes; Test tube one received 10 mL of HNO3 and with each test tube the amount of HNO3 decreased by 1 mL‚ test tube five had no HNO3 added to it. The addition of these solutions formed five test tubes of different dilutions‚ but of equal volume‚ 10 mL each. After all of the previous trials had been completed the final step was to take each test tube and pour it into a different
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the side of the cup‚ write your name and class period using a permanent marker. 3. Measure your bear (in cm) from top to bottom (length)‚ from side to side (width)‚ and from front to back (height). Use your measurements to calculate the approximate volume. Record your data in the data table. 4. Measure the mass of the bear and record that in your data table. 5. Place the bear in the cup and cover it with distilled water. Pour just enough water in the cup to fully cover the bear and no more
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Title: Spectrophotometer and its function Name: Ooi Shu Chien Student ID: 00000014507 Objective: 1. To determine the wavelength of maximum absorption‚ Amax of bromophenol blue. 2. To construct a standard concentration curve for bromophenol blue. 3. To determine the concentration of the unknown bromophenol blue solutions. 4. To determine the concentration of two different solutes‚ bromophenol blue and methyl orange‚ in
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————————————————————————————————————————— Question 1 The diagram represents a large cone of height 30 cm and base diameter 58 cm. The large cone is made by placing a small cone A of height 10 cm and base diameter 5 cm on top of a frustum B. (a) Calculate the volume of the frustum B. Give your answer correct to 3 significant figures. ........................ cm3 (3 marks) The diagram shows a frustum. The diameter of the base is 3d cm and the diameter of the top is d cm. The height of the frustum
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Surface area Surface area is the measure of how much exposed area a solid object has‚ expressed in square units. Mathematical description of the surface area is considerably more involved than the definition of arc length of a curve. For polyhedra (objects with flat polygonal faces) the surface area is the sum of the areas of its faces. Smooth surfaces‚ such as a sphere‚ are assigned surface area using their representation as parametric surfaces. This definition of the surface area is based on methods
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Lab 2 Sara Rodriguez Period 2 Purpose: What is the more accurate way to measure volume‚ by using displacement or by using a ruler? Hypothesis: If the method of displacement is used ‚ then the results will be more accurate than measuring the volume using a ruler. Materials: -250 mL graduated cylinder -Triple beam balance -A weigh boat -Ruler -Samples Procedure: 1. Gather materials such as ‚ samples‚ weigh boat‚ triple beam balance ‚ graduated cylinder‚ ruler and water. 2. Take the materials
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Breaking a Ruler with Atmospheric Pressure Introduction In this experiment‚ I will try to use air pressure‚ along with some sheets of newspaper‚ to attempt to break a ruler. Air pressure is the weight of the atmosphere pressing down on the earth. A device called a barometer measures it in units called millibars. Most barometers use mercury in a glass column‚ like a thermometer‚ to measure the change in air pressure. I came up with this idea from when I read in a book about how some kids tried to
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Page 2 The purpose of this experiment is to compare the different densities of different liquids. Density is a comparison between an object’s mass and volume. Density = Mass divided by Volume. If the weight (or mass) of something increases but the volume stays the same‚ the density has to go up. If the mass decreases but the volume stays the same‚ the density has to go down. This experiment will show how the weight of certain liquids react to each other. Page 3 The seven liquids I
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the volume is known of a liquid‚ determining its density is easily determined by weighing it accurately. Density can also be used as a tool for finding the concentration of solutions in some cases. The density is different in a substance when a substance is added to a pure liquid to when both the solute and solvent were separate all together. There are many ways to determine density. This method determined the density of a liquid by weighing a volume in a graduated cylinder. With the volume in
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TITLE Basic Technologies of Handling Chemicals and Laboratory Apparatus INTRODUCTION Density is defined as mass per unit volume. The commonly used unit to indicate the density of water is (g/cm3). Water never has an absolute density because its density varies with temperature. Water has its maximum density of 1 g/cm3 at 4oC. When the temperature changes from either greater or less than 4oC‚ the density will become less than 1g/cm3 only when it is pure water. Other factors that
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