TOPIC 2 Metals The History of Metals * Uses of metals through history: * Copper Age (3200-2300 BCE) – copper and tin were most common metals‚ and were used for ornaments‚ weapons and tools. * Bronze Age (2300-700 BCE) – copper‚ tin and bronze were used for tools‚ weapons and transport. They produced bronze by heating copper and tin with charcoal. * Iron Age (1000 BCE – 1 CE) – iron steel and lead was used for tools‚ weapons and pipes. Iron is much harder than bronze.
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Chemistry and cosmetics Cosmetics have been around since almost the beginning of time. Egyptian women used kohl to darken their eyelids‚ Cleopatra was even said to have bathed in milk to achieve a soft smooth completion. In Greece‚ women used lead carbonate (a white powder) to obtain a pale complexion‚ which probably wasn’t worth it seeing how it cost them their lives! Anyway‚ cosmetics are no modern phenomenon! Today it is a big business‚ making about $12 billion
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Chemistry and Society Jessica Yadira Lopez CHM/110 November 10‚ 2014 Jennifer Cruz Chemistry and Society Chemistry plays a huge and important role in society; Society depends on the accuracy and precision of measurements for products sold by the retail industry‚ such as a gallon of gasoline‚ a bushel of corn‚ or a liter of bottled water. These measurements have to be precise and accurate when it this relates to how farmers sell their products such as wheat‚ corn‚ milk‚ peanuts‚ and cotton‚ by
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Part 1 A） Chemist 1: New product development This career role involves the development of new paints to meet changing market needs. The chemist would be working as a member of a team developing and testing new colloidal paints to suit specific purposes. This might include weatherproof paints‚ which retain their colour and are resistant to solar radiation‚ or indoor paints that can be easily and repeatedly washed. Chemist 2: Environmental monitoring This career role as a public servant could
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Chemistry and Matter Rich McConnell‚ CH-201 Grantham University Chemistry and Matter 1. A scientist who is trying to make an insecticide that is more toxic to mosquitoes than to humans would be involved in ________. 1. Basic research 2. Applied research 3. Technology 4. Serendipity 2. How is chemistry defined? Science can be looked at like at tree‚ within this tree there are different branches one of which is Chemistry which studies composition and properties of matter and the changes they go through
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CHM 256: BASIC ANALYTICAL CHEMISTRY TUTORIAL 1: INTRODUCTION: ANALYTICAL CHEMISTRY 1. What is chemical analysis? 2. Differentiate between qualitative and quantitative analysis (Oct 2008‚ 2009‚ Dec 2009‚ Apr 2010) 3. Give 7 steps in performing any chemical analysis (Apr 2010) 4. Briefly explain how to prepare the following solutions: a) 1.0 L 10.50 % (w/v) aqueous CH3CH2CH2OH (answer : 105 g) (Oct 2006‚ Oct 2007‚ Oct 2008) b) 500 mL 2.0 M H2SO4 from a commercial reagent‚ at 90% (w/w) purity
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Blind imitation or taqlid is a sickness that has infected Muslim minds which is unnatural to the Muslims since the Qur’an repeatedly urges Muslims to think critically before accepting any idea as practicable solutions to predicaments of the ummah. Al-Alwani stresses that “increase in taqlid has caused a growing belief in fatalism”. It also has become a fertile breeding ground for rigid‚ narrow and superficial thinking; which are
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Imru al Qais was an arabian poet‚ of the 6th century‚ and the youngest Son the Kindite kings. He had a great influence on arab poetry‚ known as the master of arabic poetry and the father of love poetry. His long poems "let us stop and weep" is included as one of the seven Muallaqat. The Muallaqat is a name of a group that consists of seven poems however some may say ten poems. These poems are known as qasida. Qaseedas include long poems dating back to pre-Islamic Arabian period. Al Qays is father
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References: Hebden Chemistry 12: Workbook for Students‚ Unit 1: Reaction Kinetics‚ pg. 1-36 Heath Chemistry Laboratory Experiments‚ Experiment 18 A: Factors Affecting Reaction Rate‚ pages. 192-196 Factors Affecting Reaction Rates http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Factors_That_Affect_Reaction_Rates
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Life With ALS Have you ever wondered what the meaning behind the infamous ice bucket challenge is? Many people do not fully understand the actual diseases that the ice bucket challenge portrays. ALS and CTE’s are diseases that are developed due to abundance of concussions‚ and lack of treatment for those concussions. Most people who develop these diseases are athletes who played contact sports during their high school years or people who continued and went on to play professional. Many athletes
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