MIXTURES‚ SOLUTIONS‚ SUSPENSIONS AND COLLOIDS MIXTURES A mixture is a combination made up of two or more different substances which are mixed but are not chemically bonded. There are also types of mixtures such as homogeneous mixtures and heterogeneous mixtures. SOLUTIONS A solution is defined as a homogeneous mixture composed of a solute; a substance dissolved into another substance known as a solvent. They can also be defined as groups of molecules that are mixed up completely in even
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stopper with the short‚ straight‚ plastic gas delivery tubing through its center. Place the test tube into one of the wells of the 24- well plate. The test tube must stand up straight‚ so wrap a little tissue paper around the bottom of the test tube to help wedge it upright into a well opening. See Figure 1. Observe the reaction. Ties of Gases c. Fill one wide-neck pipet bulb completely with water‚ invert and quickly place it on top of the test tube ’s gas delivery tube as shown in the picture at
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Heather Schnicker 26 October 2012 Experiment # 4 (Lab 3) Properties of Gases PURPOSE The purpose of this experiment was to investigate and identify the chemical properties of the gases tested. DATA Gas | FLAME REACTION | GLOWING SPLINT | LIMEWATER REACTION | BROMOTHYMOL BLUE REACTION | Hydrogen | NO REACTION | | | | Oxygen | | BURNED BRIGHTER | | | Hydrogen & Oxygen | QUICK FLAME BURST | | | | Carbon Dioxide | | PUT THE FIRE OUT | NO REACTION | TURNED
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Formal lab report: Chemical or Physical Change? Problem: The purpose of this lab is to discover which observations indicate that a ………………….chemical change has taken place. Materials: Part 1: Lead [II] nitrate; Potassium iodide; 2 Test tubes; Test tube rack Part 2: The materials are found on page 161 in the textbook Sciencepower 9 Part 3: The materials are found on page 161 in the textbook Sciencepower 9 Part 4: 100 mL Beaker; Hot plate; Beaker tongs; Wire gauze;
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What happens when oil does peak? by Joel Bainerman Peak oil is often referred to as "Hubberts Peak"‚ a geophysicist who observed that oil well production followed a bell curve. According to the mainstream‚ convention view‚ peak oil is set to occur around 2006-2008. When peak oil occurs‚ production will decline approximately 3% per year at a time where global demand is increasing at 3% per year. What will all this mean for you and me- the average folk? Which industries will suffer the most- and
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ethylene glycol. This was discovered as the gas was heated to 90 degrees Celsius causing the liquid unknown to evaporate into a gas while recording the mass‚ volume‚ temperature‚ and volume. This provided the mass of 1.6 grams which was found by subtracting the mass of the Erlenmeyer flask‚ aluminum cover‚ and rubber band from the mass of the Erlenmeyer flask‚ aluminum cover and rubber band and unknown gas after heating. Then the temperature of the gas was determined by taking the temperature of
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5. Combustion of liquid fuels 5.1 Atomization of fuel Liquid fuels such as gasoline‚ diesel‚ fuel oil light‚ fuel oil heavy or kerosene have to be atomized and well mixed with the combustion air before burned. Therefor nozzles are used. Nozzles are divided into two groups: Pressure atomizers and twin-fluid atomizers. 5.1.1 Pressure atomizers Pressure atomizers are differed into turbulence nozzles and liquid sheet nozzles. At both types of nozzles the energy from the liquid pressure is converted
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5.04H: Gas Stoichiometry Lab Worksheet Name: _________________________ Data and Observations: Present all relevant data in a data table below. Include an observations section for any observations that you made during the lab. (5 points) |Data Table | |Mass of magnesium strip (grams) | | |Volume of gas collected (mL) | | |Barometric pressure (atm)
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Establish the relationship between the volume of a gas and the temperature of a gas at constant pressure. Verify Charles’s law. BACKGROUND INFORMATION The volume of a gas at constant pressure increases when the temperature of the gas is raised. This observation was first made by Jacques A. C. Charles in 1787. A quantitative study did not follow‚ however‚ until 1802‚ when Joseph L. Gay’ Lussac determined the relationship between the volume of a gas and its temperature. The relationship between
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temperature of a gas is summartzed in Charles’law. This law states: at constant pressure‚ the volume of a particular sample of gas is directly proportional to the absolute temperature. Charles’ law may be expressed mathematically: V ". T (constant pressure) V = kT o‚ : T = k (constant pressure) (1) (2) where V is volume‚ T is Kelvin temperature‚ and k is a proportionality constant. dependent on the number of moles and the pressure of the gas. If the volume of the same sample of gas is measured at
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