"Socical concerns bling h2o" Essays and Research Papers

often see it with a subscript: χsolute is an example. Example #1: 0.100 mole of NaCl is dissolved into 100.0 grams of pure H2O. What is the mole fraction of NaCl? Solution: 100.0 g / 18.0 g mol¯1 = 5.56 mol of H2O Add that to the 0.100 mol of NaCl = 5.56 + 0.100 = 5.66 mol total Mole fraction of NaCl = 0.100 mol / 5.66 mol = 0.018 What is the mole fraction of the H2O? 5.56 mol / 5.66 mol = 0.982 By the way‚ another way to figure out the last substance is 1.00 minus (the total of all other

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temperature: Decolourisation of KMnO4 occurs immediately CH2 = CH2 + [O] + H2O → CH2 – CH2 ⏐ ⏐ OH OH (a) Insert a glowing splint into the hydrocarbon hydrocarbons: Burns with smoky flame Aromatic hydrocarbons (b) Add concentrated nitric(v) acid and concentrated sulphuric acid at 55 °C: Yellow oil with bitter almond smell produced benzene NO2 + HNO3 (HONO2) Alkylbenzenes – CH3 CH3 + H2O Add alkaline KMnO4 and boil: Decolourisation of KMnO4; brown precipitate

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Chem 107 HW 8 (16‚ 26‚ 32‚ 38) 16. Determine how much energy is released or required for the reaction shown. Is this reaction exothermic or endothermic? CO2 + 2 H2O → CH4 + 2 O2 This reaction is endothermic 26. Why can’t we digest fiber? We cannot digest fiber because we lack the enzyme capable of breaking the sugar linkages in cellulose. 32. Why is unsaturated fat considered much healthier than saturated or trans fat? Unsaturated fat provides benefits of fat in the diet without the risk

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Hip Hop has gotten too hard core‚ it’s only about misogynist and materialism. Back in the day rappers had more to talk about than guns‚ money‚ jewels‚ cars and women. In today’s Hip Hop‚ it glorifies the ghetto‚ gangs‚ guns‚ money and jewelry which reinforces the tradition of the black stereotypes. Gangster rap is described as the angriest type of rap music where it glamorizes sex and violence. N.W.A was one of the most controversial rap groups in the world of hip hop who are known as the creators

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#9 was determined by experiment to be 60.0 g/mol. What is the molecular formula? 11. Aniline‚ a starting material for urethane plastic foams‚ consists of C‚ H‚ and N. Combustion of such compounds yields CO2‚ H2O‚ and N2 as products. If the combustion of 9.71 g of aniline yields 6.63 g H2O and 1.46 g N2‚ what is its empirical formula? 12. The molar mass of aniline is 93 g/mol. What is its molecular formula? 13. Calculate the mass percent of carbon‚ nitrogen and oxygen in acetamide‚ C2H5NO.

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positive inspiratory pressure that decreases the WOB and provides comfort. PS further decreases the WOB by overcoming the additional work related to resistance in the ETT. PS‚ which usually starts at pressures of 15 to 25 cmH2O‚ is weaned down to 5 – 8 cm H2O‚ at which time the patient is ready for a SBT. Another school of thought claims that PS should not be weaned to less than 10 cmH2O‚ as the positive pressure below this will no longer overcome ETT resistance and therefore WOB might increase

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 CO2(g) 3. Metal oxide  +  water  →    metallic hydroxide EX. MgO(s)  +   H2O(l)  →    Mg(OH)2(s) 4. Nonmetallic oxide  +  water  →    acid EX. CO2(g)  +  H2O(l)  →    ; H2CO3(aq) 5. Metal + nonmetal  →    salt EX. 2 Na(s)  +  Cl2(g)  →    2NaCl(s) 6. A few nonmetals combine with each other. EX. 2P(s)  +  3Cl2(g)  →    2PCl3(g) These two reactions must be remembered: 1. N2(g)  +  3H2(g)  →    2NH3(g) 2. 3. NH3(g)  +  H2O(l)  →    NH4OH(aq) Examples of decomposition reactions: 1. Metallic

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COrdination compounds Question 9.1: Explain the bonding in coordination compounds in terms of Werner’s postulates. =Werner’s postulates explain the bonding in coordination compounds as follows: (i) A metal exhibits two types of valencies namely‚ primary and secondary valencies. Primary valencies are satisfied by negative ions while secondary valencies are satisfied by both negative and neutral ions. (In modern terminology‚ the primary valency corresponds to the oxidation number of the metal

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Part I: Properties of Hydrates 1.Place about 0.1 g of the following compounds in each one test tube: CuSO45 H2O‚ CoCl26 H2O‚ NiCl26 H2O‚ and KAl(SO4)212 H2O. 2. Heat each test tube gently over a Bunsen burner flame and record your observations in your notebook. 3. After the sample has cooled‚ add a few drops of deionized water. What happens and what can be concluded? Part II:

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Chemical Reaction Aluminum hydroxide Al(OH)3 Al(OH)3(s) + 3 HCl(aq) -----> AlCl3(aq) + 3 H2O(l) Calcium carbonate CaCO3 CaCO3(s) + 2 HCl(aq) -----> CaCl2(aq) + H2O(l) + CO2(g) Magnesium carbonate MgCO3 MgCO3(s) + 2 HCl(aq) -----> MgCl2(aq) + H2O(l) + CO2(g) Magnesium hydroxide Mg(OH)2 Mg(OH)2(s) + 2 HCl(aq) -----> MgCl2(aq) + 2 H2O(l) Sodium bicarbonate NaHCO3 NaHCO3(aq) + HCl(aq) -----> NaCl(aq) + H2O(l) + CO2(g) In this experiment‚ several brands of antacids will be analyzed to determine

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