CHEMISTRY TOPIC 11 CHEMICAL CALCULATIONS CHEMICAL CALCULATIONS INTRODUCTION The first part of this ‘Chemical Calculations’ topic will help us to work out QUANTITIES involved in a reaction; For example‚ a manufacturer might want to know‚ How much ammonia will I produce from 20 tonnes of nitrogen in the Haber Process? To do these calculations you will need to be familiar with the term Ar (relative atomic mass)‚ Mr‚ Molar mass and Mole. Relative Atomic
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relationship with another element ‘B’. Chlorides of both ‘A’ and ‘B’ have bridged structure in vapour phase. Identify A and B and draw the structures of their respective chlorides. 8. Calculate the mass percent of different elements in sodium sulphate (Na2SO4). 9. Why does the rain water normally have a pH of about 5.6? When does it become acid rain? 10. The threshold frequency for the ejection of electron from a metal is 5 X 1014 s-1. Will the photon of radiation having energy 3.0 X 10-19 J
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Earth-warming carbon down into the ocean’s depths‚ where it will remain sequestered for some time‚ unable to contribute to global warming. Significance of the Experiment If we seek to create a massive algae bloom by releasing several tons of iron sulphates into the sea off the coast of the British island of South Georgia. The patch will apparently be large enough to be visible from space. If successful‚ the technique could be rolled out across vast swathes of the Great Southern Ocean. Scientists calculate
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Santiago Canales Partner: Cody Patterson MR. G Physical and Chemical Changes lab Pre lab discussion 1. a- chemical change b- chemical change c- physical change d- chemical change e- physical change 2. Change in color‚ gas‚ light or smoke and heat. 3.Becuase if the temperature changes you can notice it better this way. 4. I will use goggles and cloves all the time‚ I also need to point dangerous materials away from other people and I should be specially cautious with hydrochloric
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Cyanide (toxin) Name: Kasheba Wright Course: Chemistry in our daily Lives INTRODUCTION Cyanide is a mitochondrial toxin that is among the most rapidly lethal poisons known to man. Used in both ancient and modern times as a method of execution‚ cyanide causes death within minutes to hours of exposure. It is the salts of hydrocyanic acid‚ it is rapidly acting chemical that can exist in various forms
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HANDBOOK ON CONCRETE MIXES (BASED ON INDIAN STANDARDS) As in the Original Standard‚ this Page is Intentionally Left Blank HANDBOOK ON CONCRETE MIXES (BASED ON INDIAN STANDARDS) BUREAU OF INDIAN STANDARDS MANAK BHAVAN‚ 9 BAHADUR SHAH ZAFAR MARC NEW DELHI 110002 SP 23 : 1982 FIRST FIRST PUBLISHED REPRINT MARCH JULY 1988 1990 1983 SECOND REPRINT DECEMBER THlRD REPRINTJANUARY19% FOURTH REPRINT FIFTH REPRINT MAY1997 MARCH 1999 (Incorporating Amendment
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Grade 11 Chemistry Year End Test Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. The molar mass of copper(II) sulfate pentahydrate‚ CuSO4.5H2O‚ is a. 245.6 g/mol d. 241.5 g/mol b. 177.5 g/mol e. 249.6 g/mol c. 219.2 g/mol ____ 2. A 100.0-g sample of a compound is composed of 16.3 g of carbon‚ 32.1 g of chlorine‚ and 51.6 g of fluorine. The empirical formula of the compound is a. CClF d. C3Cl2F6 b. CClF3 e. C9Cl6F18 c. C2Cl2F6 ____ 3. A
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MODERN DAY FARMING Introduction The daily pleasures of gardening are simple‚ inexpensive and profoundly satisfying. But in the ever-increasingly dense and sprawling cities‚ gardening on rooftops‚ patios and balconies is the only way to transform them into livable spaces that are lush‚ productive and purifying. Imagine picking a head of lettuce that was cultivated in your rooftop‚ or taking in the morning perfume of a flower in your balcony‚ or biting into a strawberry warmed by the sun…. Although
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Lab #5 Chemical Reactions & Balancing Equations Objectives Observe and classify several chemical and physical changes. Give evidence for the occurrence of a chemical reaction. Write a balanced equation for a chemical reaction. Identify a reaction as a combination‚ decomposition‚ replacement‚ or combustion reaction. Background Physical properties can be observed without changing the chemical composition of the substance. Common physical properties that can be measured without changing the chemical
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carbonyl group. Some disaccharides that are exposed to a carbonyl group are also reducing sugars but less reactive than monosaccharides. By mixing the sugar solution with Benedict’s solution and heating them‚ a redox reaction will occur. The copper (II) sulphate present in Benedict’s solution reacts with electrons from aldehyde or ketose group of reducing sugars to form cuprous oxide‚ a red brown precipitate. Proteins are inherently important to any living organism. They control cell process‚ provide
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