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 Ions Ionic compounds do not contain atoms or molecules. Instead‚ we talk about ‘formula units’ The formula unit (f.u.) is the same as the chemical formula Calculate
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Metals and Non-metals Elements are divided mainly into two groups on the basis of physical and chemical properties – Metal and Non-metal. Metals: Part - I Physical Properties of Metals:- Hardness:- Most of the metals are hard‚ except alkali metals‚ such as sodium‚ potassium‚ lithium‚ etc. Sodium‚ potassium‚ lithium etc. are very soft metals‚ these can be cut using knife. Strength:- Most of the metals are strong and have high tensile strength. Because of this big structures are made using metals
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varies between 5 and 100 ptb. Chlorides Crude oil brine analysis varies‚ with 75 percent sodium chloride‚ 15 percent magnesium chloride‚ and 10 percent calcium chloride considered average. Chloride salts are the source of hydrogen chloride that is evolved during distillation. Magnesium chloride is the most prolific producer of HCI with calcium chloride and sodium chloride ranking second and third‚ respectively‚ in HCl production. As the concentration of a chloride decreases‚ the evolution rate
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How fast is your reaction? Part 1 – How temperature affect the rate of reaction Chemical equation Magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg + 2HCL → MgCl2 + H2 Graph Conclusion and questions 1. What factors/variables did you keep the same in this experiment? * We kept the same volume of hydrochloric acid (10 cm3) and the magnesium ribbon (5cm) because that way we could get a fair test experiment. We also repeated
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Hall Alkanes: Chlorination Introduction: The purpose of this experiment is to determine the reactivity of hydrogen atoms on a carbon chain using free radical chlorination. In this experiment 1-chlorobutane will be chlorinated with the combination of sulfuryl chloride and ABCN as an initiator to produce the chlorine radicals. The combination of 1-chlorobutane and sulfur chloride will produce four dichlorobutane isomers. The isomers produced and their reactivity will be analyzed by the amounts
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Examples: 1. ACID + METAL –––––––> 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)
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Chapter 1 Section 1 Anatomy-Study of internal and external structures of the body and the physical relationships among body parts Gross Anatomy -involves the examination of relatively large structures and features usually visible with the unaided eye Microscopic Anatomy-deals with structures that cannot be seen without magnification Physiology-the study of function and considers the functions of the human body Anatomy and physiology are closely interrelated Theroretically Practically Anatomical
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This experiment was all about observing a chemical reaction. During the experiment‚ we made observations and possible explanations on why Copper(II)Chloride Dehydrate and Aluminum foil created a chemical reaction. The observations were made by using Copper Chloride‚ Aluminum foil‚ and Distilled water. Before the Aluminum was added into the Copper Chloride was turquoise. As we added the Aluminum the color changed to green and the water boiled. So we met the purpose of this lab. Purpose: The purpose
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of the same element that differ in their mass number because they have different numbers of neutrons in their nuclei (atomic # will still be the same) Ex. U-235 235 - 92 = 143NO Mass: 235 Protons – Mass = Neutrons 92P+ Isotopes of Hydrogen Hydrogen –1 proton‚ no neutrons Deuterium (heavy water) – 1 proton‚ 1 neutron Tritium
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of the anion next (negative ion) Use criss-cross rule to balance for an electrically neutral compound. Name Symbol and Charge Na+ Mg2+ ClO2Formula NaCl MgO 1. 2. Sodium cloride Magnesium oxide Calcium bromide Aluminum sulphide Nickle (III) chloride (indicates charge) 3. CaBr2 4. Al3+ Ni3+ S2Cl- Al2S3 5. NiCl3 6. Sodium thiosulphate (complex ion) Na2S2O3 7. Aluminum silicate (complex ion) Al2(SiO3)3 (must bracket a complex ion with a subscript)
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