PAHANG TRIAL 2009 EXAMINATION CHEMISTRY PAPER 2 MARKING SCHEMES SECTION A - Structural Questions: Question 1. (a) (i) The presence of isotopes 1M (ii) Let the abundance of 63X be a %. The % abundance of 65X. = ( 100 – a ) 1M Relative atomic mass = ( 62.93 x a) + ( 64.93 x ( 100 -a) ) 1M
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1.1 Chemistry A. What Is Chemistry? * Because living and non-living things are made of matter‚ chemistry affects all aspects of life and most natural events. * Matter- is anything that has mass and occupies space. * Chemistry- is the study of the composition of matter and the changes that matter undergoes. B. Areas of Study * Five traditional areas of study are organic chemistry‚ inorganic chemistry‚ biochemistry‚ analytical chemistry‚ and physical chemistry. * Organic
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Match and Water in a Glass Science Magic Trick Fun Trick with Fire and Water This is a simple and interesting science magic trick involving fire and water. All you need is water‚ a glass‚ a plate‚ and a couple of matches. Pour water into a plate‚ light a match in the center of the dish and cover it with a glass. The water will be drawn into the glass. Match and Water Trick Materials • plate • water • 2 wooden matches • a quarter or other large coin • colored water
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Defining Environmental Crimes Environmental crime is a serious and growing concern at national as well as international level‚ and one which takes many different forms. Environmental crime in broad terms means an act which is committed with the intention of damaging or causing damage to the ecological and biological systems to ensure business or personal benefit. The types of acts commonly recognised as environmental crime are: pollution or other contamination of air‚ land and water; illegal discharge
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Environmental Fundamentals Laura Jackson Env/100 April 8‚ 2013 JOHN ENSWORTH Environmental Fundamentals Introduction Environmental science is defined as the study of the environment and the interconnecting systems it contains‚ furthermore‚ the way people interact with their natural surroundings and use natural resources (wise geek‚ 2013). Scientist in this field is highly interdisciplinary and extremely diverse‚ for example‚ a scientist might study volcanoes or climate change. This essay
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The study of ethics is a very old process. It is a topic scholars have been studying and theorizing on for centuries. This is not the case when we talk about environmental ethics. The study of environmental ethics has only really been studied for the past forty years or so. Ethics is defined as the study of right and wrong conduct. (Ruggiero‚ (2008)‚ pg. 5) This translates to the environment by how we as humans do right or wrong to the environment. For many years people have gone about their
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Kayla Adkins Forensic Chemistry Exam 2 I have been honest and observed no dishonesty. 1. In specific detail‚ describe a published procedure for the definitive identification of Heroin utilizing gas chromatography-mass spectroscopy (GCMS). Heroin is a white crystalline powder with no odor and a bitter taste. It is a derivative of morphine in that the –OH (hydroxyl group) is replaced by an acetyl group‚ -OCOCH3 and has a molecular formula is C21H23NO5 with a molecular weight of 369.42
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that affect the economy and the social lives of citizens. What is Environmental Degradation? Environmental degradation is a process through which the natural environment is compromised in some way‚ reducing biological diversity and the general health of the environment. This process can be entirely natural in origin‚ or it can be accelerated or caused by human activities. Many international organizations recognize environmental degradation as one of the major threats facing the planet‚ since humans
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1 UNIVERSITY OF TECHNOLOGY‚ JAMAICA DIVISION OF CHEMISTRY GROUP: MODULE: AS-2‚ SE-3‚ MT-2‚ BPharm-3‚ BENG-2C ANALYTICAL CHEMISTRY (CHY3022‚ CHY2017) ___________________________________________________________________________ UNIT 1: Assigned Reading: BASIC ELEMENTS OF ANALYTICAL CHEMISTRY Chapt. 1 and 8 Fundamentals of Analytical Chemistry‚ 8th edition INTRODUCTION Analytical Chemistry – that branch of chemistry which is concerned with the theory and practice of methods used to determine
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disappearing at the rate of 1% a year (Sherry‚ 6). If the current trend continues‚ at least 50% of all currently existing species will be either extinct or endangered by the year 2050 (Today’s Situation). For this reason endangered species deserve more protection than the current regulations provide. <br> <br>Throughout history there have been many different reasons for the extinction of species. The earliest known reason was 64-66 million years ago when scientists believe a meteorite struck earth causing
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