are the products? A. H2O2 and CO2 B. H2O and CO2 C. H202 and CO D. H2O and CO 2. Which ion may form a scummy precipitate with ordinary soap? (soap has a negative charge) A. HCO3- B. CO32- C. Na+ D. Ca2+ 3. An element forms a basic oxide with the formula XO and a hydride with the formula XH2. The hydride reacts with water to give hydrogen gas. The element X could be? A. K B. Ca C. N D. O 4. Which metal reacts with concentrated NaOH to produce hydrogen gas? A. Al B. Cu C. Fe D. MG 5. In which
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Identification of training or development need Appraisal Meeting: This employs formal and informal processes to evaluate the work performance of an individual in terms of training and development and the necessary measures to undertake for future improvement. This process is undertaken through a discussion between an employer or her representative and the employee. It is a vital exercise for improving the productivity of both the employee and the business. http://www.ehow.com/info_8785840_appraisal-meeting
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2.3.3 Effects of heavy metals on plants Plants are sensitive for both‚ deficient and excess availability of some of the heavy metal ions. In which some of them at low concentration are compulsory micronutrients‚ while the same at higher concentrations such as Cd‚ Hg‚ As are intensely toxic to the metabolic activities of the plants (Reeves and Baker‚ 2000; Fernandes and Henriques‚ 1991). Agricultural soil is contaminated by heavy metals‚ has become a critical environmental concern due to their potential
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melting point of benzoic acid was observed in range 122 to 125 ¨¬C. By comparing melting point of benzoic acid (121 ¨¬C) with result from part A‚ the result is little higher than the pure melting point. So I can tell it is little contaminated. Identification of an unknown sample (compare its observed melting range with known compounds). Unknown #42 was found to have a melting range of 99 to 101 ¨¬C in 1st trial and 95 to 97 ¨¬C in 2nd trial. The only one given pure compounds with similar melting ranges
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Drugs are used everyday by people in many different ways for many different reasons. Drug testing has become a standard in pre-employment testing‚ because of the wide variety of drug use in today’s society. Drugs tested for by a possible employer include Cocaine (crack)‚ Amphetamines (crystal)‚ Opiates (codeine‚ morphine‚ heroin)‚ PCP (phencyclidine)‚ and Marijuana. Gas chromatography/mass spectrometry is used to test hair and urine samples of possible drug abusers or job applicants‚ and it is the
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GULF STATES METALS‚ INC. CASE STUDY 1)Gulf States Metal‚ Inc. Company is engaging in Nickel refining and also produces copper‚ cobalt‚ and ammonia sulfate. Its parent comp any is International Metals Inc. GSM created before 10 years by IMI and GSM has been in operation now for 8 years. IMI expected GSM to lose money the first 2 years operation after that it was expected to be highly profitable. In fact GSM has not shown a profit‚ losing $1million last year. This loses because of variety of factors and
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calcium ions during contraction of a skeletal muscle? Calcium is an important element for live. Calcium is found in the bones of animals and humans. In muscle contraction is produce as a result of Calcium ions ‚ Ca2+‚ It comes from rapid release from the cisternae of the sarcoplasmic reticulum which cause a chemical reaction between ATP and the myofilaments. Another important function of Calcium ions occurs during the state of resting muscle. During the state of resting muscle‚ calcium Ion is “maintaining
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n this lab experiment factors that affected solubility are temperature‚ liquids‚ concentration‚ pressure‚ polarity‚ and molecule. In this experiment we use temperature‚ centrifuge‚ and concentration solutions to be able to achieve the results that we wanted. Step one of the experiment was to mix HCl‚ to cause a precipitation form‚ after that we had to decant the solution‚ then we used a centrifuged to separate the the precipitate of the supernatant liquid. After the decant was done‚ then the process
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Back Laboratory Program SAFETY IN THE CHEMISTRY LABORATORY 786 Pre-Lab Extraction and Filtration 790 1-1 Mixture Separation 792 1-2 Water Purification 794 3-1 Conservation of Mass 798 4-1 Flame Tests 801 Pre-Lab Gravimetric Analysis 828 13-1 Separation of Pen Inks by Paper Chromatography 830 13-2 Colorimetry and Molarity 834 14-1 Testing Water 838 804 7-1 Separation of Salts by Fractional Crystallization 806 7-2 Naming Ionic
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Fallacies and “Dirty Tricks” Identification The first person to try and categorize and systematically describe fallacies was Aristotle. He managed to identify thirteen different fallacies and divided them into two groups: Informal and Formal. The Informal Fallacy is hard to find because they can only be found and identified when you analyze the content of the argument. The Formal Fallacy is easy to identify because there is a defect to it and when you look at the logical formation of
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