OBJECTIVES: To determine the maximum wavelength of potassium permanganate. To plot the calibration curve of potassium permanganate. To determine the concentration of an unknown solution of potassium permanganate. INTRODUCTION: UV Spectrophotometer has 4 main components which is the UV light source‚ the sample‚ detector and the processor/recorder. Spectrophotometry is a technique that uses the absorbance of light by an analyte (the substance to be analyzed) at a certain wavelength to determine the analyte
Premium Spectroscopy Electromagnetic radiation Light
EST1 – Ethical Situations in Business 000182457 Buggs EST1 Task 310.2.1-05 Concepts of Social Responsibility Riccio Buggs Business organizations today are socially and ethically responsible for doing the right thing‚ exercising good judgment in their business activities with employees‚ stakeholders‚ customers and the community. Business organizations emphasis should not only be on profits‚ but also on how business decisions impact society. Company Q is a small grocery
Premium Social responsibility
To be deductible‚ the dominant motive for incurring an expense must be d. the intent to earn a profit. 3. Which of the following is an example of a business purpose as dominant motive? b. Only statement II is correct. 4. The Business Purpose Concept means c. Both statements are correct. 5. The legislative grace concept dictates that business expenses are grouped into certain categories that include d. Statements II and III is correct. 6. A reference
Premium Taxation in the United States
Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
Premium Atom Chemistry Chemical reaction
Candidate name…………………………………………………………………….. MINISTRY OF EDUCATION MASALA SECONDARY SCHOOL BOARD MOCK EXAMINATION 2014 SCIENCE 5124/3 PAPER 3 (CHEMISTRY) 1hour 15minutes Additional materials: Monday 30th July 2014. Answer paper INSTRUCTIONS TO CANDIDATES Write your name‚ centre number and candidate number at the top of this page all separate Attempt all questions in SECTION A and only TWO questions in SECTION B SECTION A (45 marks)
Premium Chemical element Atomic number Atom
= 45.11% N Convert % to moles‚ find the ratio in whole number‚ empirical formula. 21. Balancing Equation: Reactants = Products CH4 (g) + 2O2(g) = CO2 (g)+ 2H2O(l) 1C‚ 4H + 4 O = 1C‚ 2O‚ 4H‚ 2O 1mole of CH4+ 2 moles of O2= 1 mole of CO2+ 2 moles of H2O 16 g of CH4+ 32 x 2 g of O2 = 44 g of CO2+ 36 g of H2O 80 g reactants=80g Products 6.022 x 1023 + 2 x 6.022 x 1023 =6.022 x 1023 +2 x 6.022 x 1023
Premium Oxygen Chlorine Carbon dioxide
potassium sulphate‚ which are highly soluble in water and can be easily obsorbed by plant. 2. Car batteries contain sulphuric acid which is used as the electrolyte. 3. Sulphuric acid also used in the making of artificial silk-like fibres and rayon. 4. Chemical like paints‚ dyes and drug use sulphuric acid as one of their component materials. ← MANUFACTURE OF SULPHURIC ACID 1. Sulphuric acid is manufactured in industry though contact process 2. The process contain three stage STAGE1: Production
Premium Ammonia Sulfuric acid Sulfur dioxide
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/31 CHEMISTRY Paper 3 Practical Test October/November 2010 CONFIDENTIAL INSTRUCTIONS *4711088250* Great care should be taken to ensure that any confidential information given does not reach the candidates either directly or indirectly. The Supervisor’s attention is drawn to the form on page 7 which must be completed and returned with the scripts. If you have any problems
Premium Sodium hydroxide Sodium Hydrochloric acid
Extraction of Aluminium Aluminium ore is called bauxite. Bauxite contains aluminium oxide‚ water‚ iron oxide and other impurities. The purified dry ore‚ called alumina‚ is aluminium oxide (Al2O3). The alumina must be molten for electrolysis to work‚ since the ions are not free to move in the solid state. Unfortunately‚ alumina has a high melting point (2040 °C) and it is not practical to do electrolysis at such a high temperature. In the middle of the nineteenth century it was found that alumina
Premium Aluminium Iron Oxygen
linear Arrangement of electron pairs* Shape of the molecule or polyatomic ion Example(s) B A linear B B BeCl2 CO2 CS2 3 trigonal planar A B B trigonal planar B B A B B BF3 CH4 SiF4 NH4 + tetrahedral PCl4+ NH3 4 tetrahedral B A B B PH3 NCl3 H3O+ trigonal
Premium Atom Oxygen Molecule