medium lustre‚ malleable‚ ductile‚ opaque HCl – liquid‚ transparent‚ colourless‚ low viscosity‚ odourless Test tube felt warm bubbles 2 Burning splint placed near mouth of test tube Mg ribbon disappearing Liquid is still colourless and clear Bubbles still rising through liquid. “pop” sound when burning splint placed near mouth of test tube 3 Copper (II) sulfate (CuSO4) added to water CuSO4 – solid‚ blue‚ powder‚ odourless‚ opaque Water – liquid‚ colourless‚ transparent‚ low viscosity‚ odourless
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of diameter d = 3500mm and 5km long is used to pump water. An obstruction plugs the pipe at an unknown location so that no liquid can flow. A piston is placed in one end of the pipe and slides (without leakage)‚ compressing the water in the pipe. The pressure increases 855 k Pa when the piston is moved a distance of 734mm into the pipe. If the temperature of the liquid =300 C‚ how far down the pipe would you estimate the obstruction to be? 3- Derive an expression for the capillary height change
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non-diffusing air that was passed over the test tube at the temperature of 50oC.Thetemperature is kept constant and air stream is passed over the top of the tube to ensure that the partial pressure of the vapor is transferred from the surface of the liquid to be air stream bymolecular diffusion. The initial reading and every 2 minutes subsequent reading of the liquidacetone level are determined‚ and the experiment is conducted for 10 minutes. The experiment is repeated by changing temperature to 45oC
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of a substance depends on the nature of the substance. In this lab the densities of unknown irregularly shaped solids and liquids was determined. Accuracy and precision of the results will be estimated‚ and attention will be paid to the correct use of the significant figures. The experiment approach that will be used will tell the mass and volume of the metal and liquid determined by measuring these two quantities with a graduated cylinder and biuret. Procedure: a) The density of metals
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body of the stethoscope Earpieces - part of the stethoscope which are placed into the ears and transmit sounds directly into them Elderly - an individual with age ranging from sixty (60) years old and above Emulsify - the process of combining two liquids that do not normally mix easily Infant - an individual with age ranging from 0- 12 months (1 yr. old) Lever - a projecting handle used to adjust or operate a function People with special needs (Disabilities) - person incapable of performing specific
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25*100/1 = 25% error for the 5 mL pipet = 0.25*100/5 = 5% error for the 10 mL pipet = 0.25*100/10 = 2.5% 2. It is important to make certain that there is no air bubble in the tip of the buret below the stopcock before the initial reading of the liquid level in the buret is taken. If a 0.5-mL air bubble is present in the tip of a buret‚ what percent error in 10-mL‚ 20-mL‚ and 40-mL samples will result if the air bubble is dislodged
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volume is density‚ d and is written as (D = m/v). Using the metric system‚ the ratio for solids and liquids is expressed in g/mL or g/cm. Matter expands and contracts according to temperature. For liquids and solids‚ the change in volume is very small‚ but for gases‚ a temperature results in a proportional change in the volume. Therefore‚ gas density is dependent upon temperature; for liquids and solids‚ the small effect on volume is often ignored. PROCEDURE: A. Density of Water
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known as the fixed points. The temperature range that is typically marked on a laboratory thermometer is −10oC to 110oC. Thermometric liquids are those that are used in thermometers. Some examples of such liquids are mercury and alcohol. The thermometric fluid used by Galileo Galilei in his thermometer was air. Alcohol‚ which is used as a thermometric liquid‚ has the following characteristic properties : 1. Alcohol has a very low freezing point of about −112oC and hence is suitable in thermometers
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Celsius‚ so if the temperature is above that then ice will melt. When salt and water are mixed together‚ the salt dissolves‚ which means the salt breaks into small particles that thoroughly mix with the water. A solution made with a liquid solvent is called a liquid
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