(5 Marks) How much energy is needed to convert one mole of gaseous atoms of element (2 Marks) C into 1 mole of dipositive ions? (Total 7 Marks) MOLARITY CALCULATIONS 6. Calculate number of moles of: (a) HCl in 25 cm3 of 0.10 mol dm-3 solution
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fragrances and has been used in drugs used by those who suffer from Parkinson’s disease (RHODIA‚ 2013). Physical State | Solid at 20oC | Form | Crystalline powder | Colour | Colourless to slight yellow | Odour | Vanilla | Melting point | 80 – 83.5oC | Boiling Point | 154oC at 13.3 hPa284oC at 1013 hPa | Relative density | 1.06g/cm3 at 20oC | Molecular weight | 152.15 g/mol | Table 1: physical properties of vanillin (RHODIA‚ 2013) EXTRACTION OF VANILLIN FROM IMITATION VANILLA ESSENCE Vanillin
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ECO204: Solutions to Homework 5 1. True‚ False‚ Uncertain a. False. Methods to eliminating moral hazard include writing efficient contracts between principals and agents‚ bonding and deferred payments. The methods to eliminate adverse selection include sending signals and relying on 3rd parties to verify quality. b. True. When there is asymmetric information‚ it drives out high-quality goods because consumers have a difficult time differentiating between high- and low-quality goods. As a result‚
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Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Secondary Education Higher Tier January 2012 1 2 3 4 5 TOTAL Science B Unit Chemistry C1 CHY1H Chemistry Written Paper Unit Chemistry C1 H Thursday 26 January 2012 You will need no other materials. You may use a calculator. 9.00 am to 9.45 am Time allowed 45 minutes Instructions Use black ink or black ball-point pen. Fill in the boxes
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COLLEGE Measurement and Criminal Justice Introduction to Physical Science 03/04/2013 It is stated that science can be defined as an organized body of knowledge about the natural universe and the processes by which that knowledge is acquired and tested. Physical science focuses on the study of the nonliving. (Shipman‚ 2013‚2009) Physical science has five branches that it falls under. These branches are Physics‚ Chemistry‚ Astronomy‚ Meteorology‚ and Geology. In the field of Criminal
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celebration to mark specialoccasions. The thrill and excitement generated by fireworks‚brightening the night sky and immersing it with vivid displays ofcolour and technicality‚ which makes them a crowd pleaser. Behind all the excitement of fireworks‚ chemistry plays an importantrole in creating the vivid colours we witness lighting up the sky. Theactual chemical reactions that take place in the explosions requirethe use of oxidisers‚ reducing agents and binders. The additions ofvarying metal chlorides
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SYNTHESIS AND CHEMISTRY OF K2S2O8 ABSTRACT In this experiment‚ a sample of K2S2O8 was prepared by the electrolysis of an aqueous solution of H2SO4 and K2SO4. The peroxodisulfate anion‚ S2O82-‚ was also observed for its ability to serve as a counterion for precipitation by preparing a copper (II) complex by reacting hydrated copper (II) sulfate with ammonium peroxodisulfate in the presence of pyridine. This same ability‚ coupled with its strong oxidizing ability allowed for stabilization of
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® A manual for business Project term 1 IBMS Feb-intake ‘13/’14 29.3.’14 Group A Athina Zantomio Charlene Marie Koman Charles Ulin Dana Heres Diddens Desiree Nolta Dawit Mengesha Maarten Farenhorst Navroop Singh Bjorn Brands Coach: René van der Linden - Consultant: Raymond Zaal Group members 1 Desiree Nolta 498842 06-39803082 498842@student.inholland.nl 547527 06-52010056 567527@student.inholland.nl 2 Charles Ulin 3 Maarten Farenhorst 456768 06-20172619 456768@student
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| |Chemistry paper | | | | | | |Class: Ten |Roll No: |Subject: Chemistry | |Student’s
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procedure‚ please refer to the CHEM/ENCH 212 Laboratory Manual.[2] 10 mL of a provided 85/15 water/acetone mixture was taken in a vial and
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