number of atoms in: (a) 3 moles of phosphorus (b) 0.5 moles of sodium Answers (a) 1.81 x 1024 atoms (b) 3.01 x 1023 atoms Molecules Calculate the number of molecules in 6 moles of methane Number of Molecules = moles x molecules in 1 mole = 6 x 6.02 x 1023 molecules = 3.61 x 1024 molecules Calculate the number of molecules in: (a) 0.37 moles of sulphur dioxide (b) 3.4 moles of hydrogen chloride Answers (a) 2.23 x 1023 molecules (b) 2.05 x 1024 molecules
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inhibitors that inhibit the rate of Enzymatic Browning in different fruits and vegetable. REQUIREMENTS: ➢ Citric Acid (1% solution) ➢ Acetic Acid (1% solution) ➢ Ascorbic Acid (1% solution) ➢ Sugar (1%.Solution) ➢ Sodium chloride (1% solution) ➢ Sulfite salt (1% solution) ➢ Samples (Potato‚ Banana‚ Apple) Enzymatic Browning: Enzymatic browning (oxidative) is a reaction between oxygen and a phenolic substrate catalyzed by polyphenol oxidase result in orthoquinone
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! Isolation of the Components of BC Powder Introduction Aspirin‚ Caffeine and Salicylamide were extracted from an over-the-counter pain reliever (BC Powder). These components were separated by manipulating their solubilities by adjusting the acidity and basicity of the solution. By doing this‚ the three components were forced into conjugate acid (or base) forms‚ causing selective solubility in either an aqueous or organic solvent. These layers were then separated by use of a separation funnel
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methylene chloride 2.) Cap the tube securely and shake it vigorously‚ venting frequently 3.) Allow the layers to separate 4.) If the layers do not separate well‚ the mixture may be spun in a centrifuge. Or stir with a spatula or add about 1 mL of a saturated sodium chloride solution 5.) Using a Pasteur pipette‚ transfer the lower methylene chloride layer to a clean‚ dry‚ 5-mL conical vial. 6.) Repeat this extraction procedure two more times with fresh 1.0-mL portions of methylene chloride and place
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LESSON PLAN School : Senior High School Topic : Solubility product of Constant (Ksp) Grade : XI Semester : 2 Time Allocated : 30 minutes I. Competency Standard Understanding properties‚ measuring method and applying of acid base solutions. II. Basic Competency Predicting precipitation from a reaction based on solubility and solubility product constant principle III. Indicator 1. Explain the meaning of Solubility Product Constant (Ksp) 2. Write
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–––––––> SALT + HYDROGEN Hydrochloric acid + Magnesium Magnesium Chloride + Hydrogen 2HCl(aq) + 2Mg(s) 2MgCl(aq) + H2(g) Sulphuric acid + Zinc Zinc Sulphate + Hydrogen H2SO4(aq) + Zn(s) ZnSO4(aq) + H2(g) Nitric acid + Aluminium Aluminium Nitrate + Hydrogen 2HNO3(aq) + 2Al(s) 2AlNO3(aq) + H2(g) 2. ACID + BASE –––––––> SALT + WATER Hydrochloric acid + Copper II Oxide Copper II Chloride + Water HCl(aq) + CuO(s) CuCl(aq) + H2O(l) Nitric acid +
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reaction. Materials: 1. Goggles 2. Powdered calcium carbonate (CaCO3) 3. Metal scoop 4. Marble chips 5. Cold water 6. Hot water 7. Room temperature water 8. 1M hydrochloric acid (HCl) 9. 3 M HCl 10. Iron (III) chloride (FeCl3) 11. Sodium chloride (NaCl) 12. Calcium chloride (CaCl2 ) 13. Potassium nitrate (KNO3) 14. 0.3% hydrogen peroxide (H2O2) solution 15. 8 test tubes 16. Test tube rack 17. 3 250mL beakers 18. Alka Seltzer tablet 19. 3 pieces of zinc metal Procedure: Particle
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200 and could not diffuse. My prediction was wrong as I originally thought that the MW of glucose was higher than 200. 4. Put the following in order from smallest to largest molecular weight: glucose‚ sodium chloride‚ albumin‚ and urea. a. The molecular weight from smallest to greatest is Sodium Chloride‚ Urea‚ Glucose‚ Albumin. Activity 2 Simulated Facilitated Diffusion 1. Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs. a. One way that
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cylinders‚ 20 percent sodium chloride solution‚ three test-tubes‚ test-tube rack‚ scalpel blade‚ Gel ink pen‚ syringe-10cm^3‚ Plastic ruler with mm‚ tile‚ forceps filter paper‚ Masking tape. Method: 1) Three test-tubes‚ A‚ B and C were labeled and initials of experimenters were applied with the date: January 29‚ 2013. 2) A syringe was used to put 10cm^3 of water in tube A and 5cm^3 in tube B along with 5cm^ 20 percent sodium chloride solution and 10cm^3 20 percent sodium chloride solution in tube C
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RULES!!!! IONIC/ UNIVALENT 1. Full name of metal first. 2. Name of non-metal second‚ BUT change ending to IDE. I.E. NaCl Sodium Chloride IONIC COMPOUND WITH MULTIVALENT 1. Full name of the metal‚ write in the Roman numeral to indicate the valence in brackets. 3. Name of non-metal second‚ BUT change ending to IDE. I.E. FeCl3 Iron (III) chloride BINARY COVALENT COMPOUNDS Two nonmetals 1. Name each element. (the element furthest to the left on the periodic table is written
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