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minutes for this part Part A – 10 marks Attempt Questions 1 – 10 Allow about 10 minutes for this part Answer Box for Questions 1 – 10 1 2 3 4 5 6 7 8 9 10 A A A A A A A A A A B B B B B B B B B B C C C C C C C C C C D D D D D D D D D D JRAHS Chem 11 – Final Examination – 2006 Page 2 of 11 ► Mark your answers for Questions 1 – 10 in the Answer Box on page 2. 1 The law of combining volumes states that the ratio of gases involved in a chemical reaction can be expressed in simple whole
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chemteam.info/Chem-History/Hydrogen-Bond-1920/DotDiagram-p1431b.GIF MERGEFORMATINET (ammonia) (water) (ammonium hydroxide) Works Cited Ammonia. Encyclopedia Britannica. HYPERLINK http//www.britannica.com/EBchecked/topic/20940/ammonia-NH3 http//www.britannica.com/EBchecked/topic/20940/ammonia-NH3 (Accessed April 29‚ 2014) Shrestha‚ Binod. Physical Properties‚ Chemical Properties and Uses of Ammonia. Chem
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CASE: SHOULD WE GO BEYOND THE LAW? ETHICAL DILEMMA - The right to make profit versus the duty to protect the environment. OBJECTIVE - To make the company realize the importance of protecting the environment. - To help Chem-Tech become an ethically and socially responsible company. CONCEPTS / ANALYSIS - Sta Clara University published the five sources of ethical standards that can guide a person in making an ethical decision. Below are two of the five approaches they suggested: The Utilitarian
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OIXDATION(AND(REDUCTION(–(REDOX(CHEM(1( ( KEY(REDOX(CONCEPTS( •! Oxidation)and)reduction)are)electron(transfer(processes)(reactions).)) o! Oxidation(–(Loss)of)electrons)) !! Reductant((reducing)agent))–)undergoes)oxidation.)) o! Reduction(–(Gain)of)electrons)) !! Oxidant((oxidising)agent))–)undergoes)reduction.)) ! Example:(((((((((((Mg(s)(+(2H+(aq)( (Mg2+(aq)(+(H2(g)( o! This!reaction!can!be!broken!up!into!two!halfEreactions(( !! Oxidation:)Mg(s))")Mg2+)+)2e:)(lost)electrons))( !! Reduction:)2H+)+)2e:)")H2)(gained)electrons))(
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by rice husk Fiol‚ N.‚ Villaesscusa‚ I.‚ Martinez‚ M.‚ Miralles‚ N.‚ Poch‚ J. and Serarols‚ J. (2006). Sorption of Pb(II)‚ Ni(II)‚ Cu(II) and Cd(II) from aqueous solution by olive stone waste‚ Sep Freundlich‚ H. (1906). Adsorption in solution. Phys. Chem. Soc.‚ 40: 1361–1368. Ho‚ Y.S.‚ Chiu‚ W.T.‚ Hsu‚ C.S. and Huang‚ C.T. (2004). Sorption of lead ions from aqueous solutions using tree fern as adsorbent Hansen‚ H.K‚ Ribeiro‚ A. and Mateus‚ E. (2006). Biosorption of arsenic (V) with Lessonia nigrescens
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