Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
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Chemistry Notes Cracking: * 2 types of Cracking; Catalytic cracking and Steam/thermal cracking. * Catalytic cracking‚ using a catalyst called Zeolite (Aluminosilicate)‚ 500 degrees C‚ in the absence of air and at pressures just above atmospheric * Thermal cracking is done without a catalyst; steam is passed through very hot metal tubes at 700-1000 degrees C at just above atmospheric pressure. * This is used to break down longer chains of unsalable hydrocarbons into smaller salable
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ncer Lab Manual Physics I LabPaq: PK-1 A Lab Manual of 13 Experiments for Independent Study Published by Hands-On Labs‚ Inc. Physics 1: Lab Manual of Experiments for the Independent Study of Physics Designed to accompany Physics LabPaq PK-1 081611 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on the intellectual properties associated with the LabPaq’s
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Republic of the Philippines Iloilo State College of Fisheries DUMANGAS CAMPUS Dumangas‚ Iloilo College of Hospitality Management PRACTICUM MANUAL Name: Course/Year & Section: Home Address: Establishment: Address: COLLEGE OF HOSPITALITY MANAGEMENT VISION College of Hospitality Management will engage in producing potential manpower in hospitality industry and the center of globally competent graduates who can uplift the socio-economic‚ political
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Waste to Wealth : Craft Development Using Banana Fibre A PEOPLE’S MANUAL WASTE TO WEALTH : CRAFT DEVELOPMENT USING BANANA FIBRE CAPRE FOUNDATION | Page 1 www.caprefoundation.org A People’s Manual Waste to Wealth : Craft Development Using Banana Fibre About CAPRE Foundation CAPRE Foundation is a non-profit‚ voluntary organization registered in 1999 under Section 21 of the Societies Registrations Act‚ 1860. It was founded by grass roots people including tribals with a social conscience
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Chemistry Coursework – Titration Background Science A titration is the neutralisation of an acid or an alkali. To achieve this‚ one must be added to the other in a specific amount‚ strength and concentration. A substance is neutral when its pH is 7. It is most acidic closer to 0 and is most alkaline closer to 14. 28492453194050 0 7 14 595423979670
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Standardize a solution of potassium manganate(VII) by an iron (II) salt (ammonium iron (II) sulphate) Introduction Oxidation numbers describe the number of electrons the atom will gain or lose during a reaction. Each atom in an equation can be assigned an oxidation number according to certain rules. If the oxidation number of an atom increases as you go from the left side to the right side if an equation‚ oxidation has occurred (electrons have been lost); if the oxidation number decreases
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of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred. The procedure for this experiment included a few different steps. The first steps were to add the nitrate solutions into the lettered parts of the 96-well plate. Once you were done with that‚ you were supposed to add the sodium solutions to the numbered parts of the 96-well plate‚ so that the solutions were added together. You were
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as a drying agent to ensure that pure cyclohexene was obtained‚ calcium chloride works by binding itself to the water molecule thus removing it in the process. After the dehydrating process was completed‚ a few tests using Potassium Permanganate solution and Bromine which were purple and Reddish-Orange respectively was conducted. The tests showed a positive result which indicated that the product was indeed pure cyclohexene. As a result of this‚ it was concluded that the activity was indeed a success
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the time continued Aristotle‚ another Greek philosopher‚ thought that the atomic theory was worthless and then dismissed it. He on other hand‚ Aristotle was born in 384 BCE in Stagira‚ Greece. Aristolote mainly believed in the ultimate reality in physical objects. He made Genus and Species possible for us today. Aristotle famously rejected Plato’s theory of forms that object exist independantly. Aristotle argued that they can not exist apart. Plato another greek philospher believed the opposite as
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