Steven Leung 9/19/06 Lab Report The Empirical Formula of a Copper Oxide Purpose: To convert an unknown copper oxide to copper (Cu) metal using natural gas to provide a reducing environment as shown below: Cu O (s) + CH (g) ¨ Cu (s) + Co (g) + H O (g) From the mass difference between the unknown copper oxide and the Cu metal generated at the completion of the reaction and the molar mass of Cu and oxygen‚ the empirical formula of the original copper oxide can be calculated. Materials:
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oxygen and exploded. After cooling‚ the residual gases occupied 137.5cm3. the volume was reduced by 100cm3 on exposure of the gases to Potassium hydroxide solution and the remaining gas was oxygen. a) Determine the molecular formula of P b) Write the possible structural formula of P and name them. S.5 Mathematics Answer all questions. 1. ABCD is a quadric lateral where A1 B1 C and d are the points (3‚-1)‚ (6‚ 0)‚ (7‚ 3) and (4‚2). Prove that the diagonals bisect each other at right angles. Hence find
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structure is derived. Firstly it is important to determine the percentage composition of elements to work out the empirical formula. The empirical formula was found to be C10H12O and the mass of the unknown was 148.09 m/z which when calculating the molecular weight of the empirical formula it did equal 148.09 g mol -1. This means that the empirical formula is also the molecular formula. As 12.01x10 carbons +1.008x12 hydrogens + 16= 148.09 09 g mol -1. From this knowledge the unknown molecule must include
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g / 1 mol = 102.5 g Determine the number of atoms that are in 0.58 mol of Se. 0.58 mol x 6.02 x 1023 atoms / 1 mol = 3.49 x 1023 atoms How many moles of barium nitrate contain 6.80 x 1024 formula units? 6.80 x 1024 formula units x 1 mol / 6.02 x 1023 formula units = 1.13 x 101 CP Chemistry Test Review (Unit 10) Complete the following reactions‚ balance the equations and identify the type of reaction. For single and double replacement reactions indicate
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Cost‚ Volume‚ and Profit Formulas All businesses require becoming profitable or at some point they will fail. Accounting plays an essential role in determining if the company will become successful and continue to do so over time. Using well-defined formulas in order to assess the exact numbers will facilitate the actions a company needs to carry out in order to maintain its goals. The accounting department would look at the cost-volume-profit analysis to concentrate on the different components
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and it also help them gain the necessary weight faster than they would receive from formula. In breast milk‚ eight percent of the cells are macrophages. These cells help kill different kind’s of viruses‚ fungus‚ and bacteria. Breast feeding can be much easier and convenient‚ because it can be done at any time‚ without preparation. With bottle feeding‚ there are lots of bottles to wash‚ finding the right formulas to mix‚ refrigeration to worry about‚ and warming of the milk that all must be done.
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Trigonometry Trigonometry (from Greek trigōnon "triangle" + metron "measure"[1]) is a branch of mathematics that studies triangles and the relationships between the lengths of their sides and the angles between those sides. Trigonometry defines the trigonometric functions‚ which describe those relationships and have applicability to cyclicalphenomena‚ such as waves. The field evolved during the third century BC as a branch of geometry used extensively for astronomical studies.[2] It is also the
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Reference Guide & Formula Sheet for Physics #20 Page 1 of 8 Components of a Vector if V = 34 m/sec ∠48° then Vi = 34 m/sec•(cos 48°); and VJ = 34 m/sec•(sin 48°) #4 Weight = m•g g = 9.81m/sec² near the surface of the Earth = 9.795 m/sec² in Fort Worth‚ TX Density = mass / volume #21 Heating a Solid‚ Liquid or Gas Q = m•c•∆T (no phase changes!) Q = the heat added c = specific heat. ∆T = temperature change‚ K Linear Momentum momentum = p = m•v = mass • velocity momentum is conserved
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Breastfeeding can offer many benefits for babies. Breast milk contains the right balance of nutrients to help your infant grow into a strong and healthy toddler. Most of the nutrients and vitamins that are in breastmilk help the baby develop into a strong and healthy toddler. It also help to protect the baby from diseases and other illnesses. It may also help the mother’s health. Statistically‚ depending on race or culture‚ breast feeding can vary. Overall‚ about 73% of U.S. moms said that
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enlightens us on higher pleasure. “Who is Crazy?” brings to light that‚ the whole world is divided into factions‚ and each accuses the others of being crazy. But if there are no criteria by which to judge sanity‚ then who can decide? “The Only Peace Formula” speaks about the threats of war that are looming large‚ increasing crime rate the world over and the means to reduce it. “World of Modern Science” expounds the childishness of the scientific community in conducting space programs costing billions
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