Determining the enthalpy change for the thermal decomposition of potassium hydrogen carbonate into potassium carbonate. Controlled Variables: 1. Volume of HCl ± 0.5 cm3 (± 2%) 2. Concentration of HCl‚ 3. Same mass of K2CO3 and KHCO3 within specified ranges of 2.5 – 3.0g and 3.25 – 3.75g respectively 4. Same calorimeter used i.e. polystyrene cup is used in this experiment 5. Same thermometer will be used ± 0.10K 6. Same source of K2CO3‚ KHCO3 and HCl Raw Data Results: The raw
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(a)6CO2 + 6H2O C6H12O6 + 6O2 (b) C6H12O6 + 6O2 6CO2 + 6H2O (c)CaCO3 CaO +CO2 (d)2H2O 2H2 +O2 Q.15 What type of reaction is represented by CaO +CO2 → CaCO3 (a)Combination (b) Decomposition (c) Displacement (d) Double displacement Q.16 Which of the following Cannot be decomposed by sunlight? (a)NaCl (b) CuCl2 (c)CaCl2 (d) none of these Q.17 Which of the following type of energy is used by living organisms to perform
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Tobacco Composting: An Alternative to Burning or Landfill Composting is the purposeful biodegradation of organic matter‚ such as yard‚ food and agro-industrial waste. The decomposition is performed by micro-organisms‚ mostly bacteria‚ but also yeasts and fungi. A biodegradable material is capable of being completely broken down under the action of microorganisms into carbon dioxide‚ water and biomass. A compostable material biodegrades substantially under specific composting conditions.
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even be damaged‚ such as when exposed to too much heat. A damaged enzyme may no longer work to catalyse a chemical reaction. (Science Buddies on March 8‚ 2012) Aim : The objective of these experiments is to investigate the change in the decomposition rate between the catalase and hydro peroxide with cooked and raw potato and liver. Hypothesis: With consideration to previous studies done into the topic. It is hypothesized that the raw food will provide a higher rate of reaction than the cooked
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ABSTRACT: This lab allows us to observe the conversion of hydrogen peroxide (H2O2) into water and oxygen gas. An enzyme known as catalase facilitates this decomposition reaction. The catalase enzyme acts as catalysis‚ helping lower the energy needed to activate the reaction while the enzyme itself is not affected. Catalase is a digestive enzyme used to break down hydrogen peroxide‚ which is a normal byproduct of cellular respiration. The reaction could take place without the help of catalase‚ but
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according to the following equation: 4 C3H5(NO3)3(s) 12 CO2 (g) + 10 H2O (g) + 6 N2 (g) + O2(g) A 500 g sample containing nitroglycerin was allowed to decompose. A. If the decomposition yielded 67.8 g of H2O what is the percent purity of the sample? B. How many liters of CO2‚ N2‚ and O2 were produced from this decomposition? 5. Cyclopropane mixed in the proper ratio with oxygen gas can be used as an anesthetic. A. At 755 mm Hg and 25C‚ cyclopropane has a density of 1.71 g/L. What is its molar
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that recycling 1 ton of plastic saves the equivalent of 5‚774 kilowatt-hours of electric energy. In addition‚ many companies that using plastic to generate power have established in recent years. Another way to address this problem is Hydride decomposition. This method could transform sixty to eighty percent of the composition of plastic to crude oil. Crude oil is one of the most essential fuels in the world‚ about eighty-eight percent of the crude oil is used to be fuel‚ and so recycling plastic
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Mg(NO3)2(aq) 12. Balance the following equations. a. 2SO2 + O2 -> 2SO3 b. Fe2O3 + 3H2 -> 2 Fe +3H2O c. 4P + 5O2 -> P4O10 d. 2Al + N2 ->2AlN Section 11.2 22. What are the five types of chemical reactions? They are combination‚ decomposition‚ single-replacement‚ double-replacement‚ and combustion. 23. What are the keys to predicting the products of the five general types of reactions? The key to predicting the products of the five general
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------------------------------------------------- LEFT – OVER RICE (Oryza Sativa) : A CHEAP AND PRACTICAL COMPOST ENHANCER A Science Investigatory Project Submitted as an Entry to the 2012 Local Science Fair University of the Immaculate Conception High School Department Davao City Proponents: Angeli Mae Morente Raven Jezzrel Dela Cruz October Rose Toral I – St. Claire Project Adviser: Ms. Bonimar Angelie Diel August‚ 2012 ABSTRACT Time and again farmers‚ plant growers
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Synesthesia is a genetic and a neurological condition in which one’s senses overlap and affect one another. For example‚ the sound of a piano can produce the color blue‚ or the letter “A” can generate the sound of a violin. Synesthesia is defined as “a sensation produced in one modality when a stimulus is applied to another modality‚ as when the hearing of a certain sound induces the visualization of a certain color” (Dictionary.com). For instance‚ if one sees a color‚ it can conjure a scent. If
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