Report Introduction Mummification is an ancient Egyptian method which is a natural or deliberate process intended to dehydrate the body to preserve it. They done this because they believed that if a body was left to rot then it would destroy their soul‚ so they believed that the body needed to be intact to serve as host for the soul. So they preserved bodies so they could use them in the afterlife‚ where the Egyptians believed they would make a journey to another life. To start to mummify a body
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The half-life of this reaction is A. B. C. D. 3.8x1fJ- 1 s 92.4 s 120 s 6.9x10" 3 s 8. Which of the following mixtures of liquid is expected to obey Raoult’s Law? A. B. C. D. Ethanol and water Ethanol and propanone Benzene and ethylbenzene Hydrochloric acid and water 9. What is the value of the degree of freedom‚ F at the triple point in the phase diagram of H 2 0? A. B. C. D. 0 1 2 3 10. What is the name of the colloid if the dispersed phase is a solid and the dispersion medium is
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| Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH | -1 | Carbonate | CO3 | -2 | Nitrate | NO3 | -2 | Phosphate | PO4 | -3 | Hydrogen Carbonate | HCO3 | -1 | Acids and Bases in the Laboratory Back to Top Some common acids that are found in laboratories are Hydrochloric acid (HCl)‚ Sulphuric acid (H2SO4) and Nitric acid (HNO3)
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Mark Scheme (Results) Summer 2012 International GCSE Chemistry (4CH0) Paper 1C Science Double Award (4SC0) Paper 1C Edexcel Level 1/Level 2 Certificate Chemistry (KCH0) Paper 1C Science (Double Award) (KSC0) Paper 1C Edexcel and BTEC Qualifications Edexcel and BTEC qualifications come from Pearson‚ the world’s leading learning company. We provide a wide range of qualifications including academic‚ vocational‚ occupational and specific programmes for employers. For further information‚
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Instructor’s Guide Master Materials List (complete for 24 students working in pairs) Silver nitrate‚ AgNO3‚ 0.2 M‚ 100 mL* Silver nitrate‚ AgNO3‚ 0.1 M‚ 100 mL* Cupric nitrate‚ Cu(No3)2‚ .02 M‚ 100 mL* Zinc nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Ferric nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Hydrochloric acid‚ HCl‚ 6 M‚ 125 mL* Nitric acid‚ HNO3‚ 6 M‚ 125 mL* Ammonia‚ NH3‚ 6 M‚ 125 mL* Sulfuric acid‚ H2SO4‚ 6 M‚ 125 mL* Acetic acid‚ CH3COOH‚ 6 M‚ 125 mL* Sodium chloride‚ NaCl‚ 0.2 M‚ 100 mL* Sodium
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Periodic Table: * Mass Number = protons + neutrons in the nucleus * Atomic Number = number of protons in the nucleus * Number of neutrons = mass number – atomic number Example: Lithium (Li) * # of protons + # of neutrons = mass # * 3 + 4 = 6.9/ 7 * The atomic mass is the mean of all the isotopes of Lithium in nature; round the number * Isotopes of a specific element have a varying number of neutrons * The number
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Na Sodium Intense yellow P Phosphorus Pale bluish green Pb Lead Blue Rb Rubidium Red to purple-red Sb Antimony Pale green Se Selenium Azure blue Sr Strontium Crimson Te Tellurium Pale green Tl Thallium Pure green Zn Zinc Bluish green to whitish green Sources of error for the flame test: The test cannot detect low concentrations of most ions. The brightness of the signal varies from one sample to another. For example‚ the yellow emission from sodium is much brighter
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grams of manganese(Ill) oxide are also made? d. How many grams of glycerin will be needed to react with 50.0 g of KMn04? How many grams of C02 will be produced in the same reaction? 196. Calcium carbonate found in limestone and marble reacts with hydrochloric acid to form calcium chloride‚ carbon dioxide‚ and water according to the following equation: CaC03(s) + 2HC1 {aq) —♦ CaCl2(a<jf) + C02(g) + H20(/) a. What mass of HCI will be needed to produce 5.00 x 101 kg of CaCl2? b. What mass of C02 could
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Acids And BAses Acids And BAses 8.1 8.2 8.3 8.4 18.1 18.2 18.3 18.4 18.5 Theories of acids and bases Properties of acids and bases Strong and weak acids & bases The pH scale Calculations involving acids and bases (AHL) Buffer solutions (AHL) Salt hydrolysis (AHL) Acid-base titrations (AHL) Indicators (AHL) 8 8.1 THeORies OF Acids And BAses 8.1.1 Define acids and bases according to the Brønsted–Lowry and Lewis theories. 8.1.2 Deduce whether or not a species could act as a Brønsted–Lowry
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early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest
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