huge amounts of energy‚ and their molecules are spread out as much as possible. With very little pressure‚ when compared to liquids and solids‚ those molecules can be compressed. It happens all of the time. Combinations of pressure and decreasing temperature force gases into tubes that we use every day. You might see compressed air in a spray bottle or feel the carbon dioxide rush out of a can of soda. Those are both examples of gas forced into a smaller space than it would want‚ and the gas escapes
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completed in Barisal and a private Airlines named Air Bengal has begun its regular air flight between Dhaka Tejgaon Airport and Barisal.The city is sometimes called the "Venice of Bengal". The majority of the people of Barisal are Muslims. There are various occupations chosen by the people of Barisal . Being a rustic area‚It holds farming largely. Barisal is a rice producing center of Bangladesh. Balam is the most popular rice in Bangladesh growing in Barisal. Barisal has given birth to many famous
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The effect of temperature on a reaction rate In this experiment I shall be investigating how temperature affects the rate of reaction Rates of reaction The Factors that affect the rate of reaction are temperature‚ surface area‚ concentration‚ catalysts‚ light and pressure Surface area – Surface area is the amount of solid surface that is available for reaction - Only affects solids so this will not affect our
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of all three trials. Heat tends to increase the rate of chemical reactions‚ explained in the article Temperature Effects (Introduction to Enzymes) by Chris Jamison. “Like most chemical reactions‚ the rate of an enzyme-catalyzed reaction increases as the temperature is raised. A ten degree rise in temperature will increase the activity of most enzymes by 50 to 100% . Variations in reaction temperature as small as 1 or 2 degrees
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ml of 1M solution = 10.6g Weighing of salt using electrical balance * Mass of Na2CO3 + beaker = 78.64g * Mass of beaker = 68.04g * Mass of Na2CO3 = 10.6g 1. 10.6g of Na2CO3 was weighed in a dry beaker. Small amount of distilled water was added and the salt was dissolved. 2. The contents of the beaker were transferred to clean volumetric flask of 100ml. 3. Collection of washings was done 3-4 times. 4. The solution was made 100ml
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Sodium was first discovered by Sir Humphrey Davy in 1807. This element is the 11th element found on the periodic table; located in group 1 and period 3. Its chemical symbol is Na and it is classified as a metal. Metals‚ by definition‚ means that they are elements that are luster‚ lose electrons very easily‚ malleable‚ ductile‚ and are great conductors of heat and electricity. Sodium is found in group 1 of the periodic table because the electronegativity of sodium is very low. This allows it to form
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Stephanie Thao Chemistry 1151 Laboratory Analysis of acid by titration with sodium hydroxide Ms. Hoang November 2012 Introduction: The purpose of this experiment is to demonstrate an example of how to determine the unknown molarity of hydrochloric acid by titration with a base (sodium hydroxide). Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte (wekipedia). The first step will be measuring
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contamination : - resulting from 20th century activities in atomic physics‚ such as nuclear power generation and nuclear weapons research‚ manufacture and deployment. (See alpha emitters and actinides in the environment.) * Thermal pollution : -is a temperature change in natural water bodies caused by human influence‚ such as use of water as coolant in a power plant. * Visual pollution : -which can refer to the presence of overhead
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1. A student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202-214°C. Explain. • The sodium carbonate is supposed to be added when extracting the tea leaves with hot water in order to help purify the caffeine. So since the student neglected to add sodium carbonate the caffeine won’t be pure but the student would still be able to recover a large amount of caffeine. The literature melting point
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Trial 4 Trial 5 Mass of 50 mL water (g) 50 50 50 50 50 Minimum Temperature of Water (C) 22 22.4 18.5 17.2 18.1 Maximum Temp. Of Water (C) 77.2 88.5 90.4 74.3 83.9 Initial mass of food (g) 4.8 5.4 5.1 4.7 4.5 Final Mass of food (g) 3.3 3.3 3.2 3.1 3.1 Length of time the food burned 4 minutes 4 minutes 3.45 minutes 3.83 minutes 3.6 minutes Cashews Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Mass of 50 mL water (g) 50 50 50 50 50 Minimum Temperature of Water (c) 17.8 18.5 18.5 19.2 18.3 Maximum Temp. Of Water
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