UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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how chemistry affects us today. Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Most people have chosen to write their essay about how chemistry has played an important role in everyday life. The simple fact is that chemistry plays an important role in every person’s daily activities from the moment we’re born. Chemistry is the branch of science that deals with the structure of organic and inorganic matter( any substance or organism
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Combustion of Acetylene (ethyne) Rx: Back Why I don’t do acetlyene explosions in our lab.... Combustion of alkanes A quick review.... • Combustion reactions of alkanes consist only of C and H (hydrocarbon) • require O2(g) as a reactant • produce CO2(g) and H2O(g) and a large amount of energy!! Oxygen can be the limiting reagent which can lead to Incomplete combustion. For complete combustion of a hydrocarbon‚ oxygen must be in excess. If there isn’t sufficient oxygen‚ incomplete combustion occurs
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The thesis is a vocal point that explains how the chemistry of playing basketball help the body function well. Unfortunately‚ when people look in the mirror their reflection put them in the state of mind where they do not appreciate what they see. Moreover‚ that push themselves to be more active. After a few weeks‚ everyone starts to have those days where if the mentioning of the word “exercise” there will be a thousand excuses of why you should not. However‚ there are many ways we can be physically
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The Laboratory’ ’The Laboratory’ by Robert Browning is a dramatic monologue that tells the story of a woman’s plot to murder her romantic rival. The form in which Browning has written this poem subtly reveal aspects of the female speaker whilst allowing the reader to make their own personal judgement on her behaviour and character‚ which would commonly be that she is a jealous‚ obsessed‚ blood-thirsty and sadistic woman. The speaker in the poem demonstrates signs of insanity and instability
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Chemistry plays an important part in studying Biology. It answers some questions that Biology could not explain alone. Questions like: How does an organism convert foods for energy? How do plants use sunlight and water into all the things that cells needed to grow and reproduce? How does the basic unit of life passed through generation to the next? Here are some contributions of Chemistry in Biology: • Within atomic theory‚ chemistry contributes towards biology in the understanding of atoms
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Health and Safety – Long Essay When using ICT related equipment‚ responsibility for your own health and safety is a big factor to consider. When working in an office both the employer and the employee have responsibilities to ensure your health and safety is covered at all time. As an employer‚ your job would be to keep your work place a safe environment. This could be done by making sure all equipment and machinery is safe to use for your employers or providing the appropriate medical equipment
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The lab performed was laboratory techniques and measurements. The purpose of this lab was to familiarize ourselves with different techniques used in the lab‚ taking proper measurements‚ and how to use the International System of Units (SI). Throughout lab we learned about mas‚ volume‚ length and temperature‚ and to be able determine density and concentration. To be able to documents properly and make effective observations we must be able to understand the International Measurement System. Length
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In both Macbeth and “The Laboratory” we have a very ambitious woman who is willing to resort to murder to accomplish her ends. Both women are not afriad to kill‚ both use a lot of descriptive language‚ and both are planners. The main similarity between the two of them is that both are open to murder and neither has any moral problems with it. In “The Laboratory” the narrator describes how she is going to kill her lover’s mistress. NOW that I‚ tying thy glass mask tightly‚ May gaze thro’
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Title: Laboratory Techniques & Measurements Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume‚ mass‚ length‚ and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions. Procedure: I used a ruler‚ thermometer‚ and scale to take measurements. I used a graduated cylinder‚ short step pipet‚ scale‚ and ruler to determine volume and density. I used a
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