its two base components. So when Hydrochloric acid is placed into water‚ it splits into a hydrogen ion and a chlorine ion. The amount that an acid ionises depends on its strength (Tinnesand‚ n.d.). A strong acid ionises completely while a weak acid only ionises partially. Furthermore‚ the strength of the acid will also have an effect on the rate of the reaction. A strong acid will have a faster reaction then
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Mealworms and Caffeine Caffeine is the most commonly used stimulant in the United States. In North America‚ sixty to seventy five percent of caffeine consumption comes from coffee and fifteen percent to thirty percent comes from tea. It can be found in a variety of forms including: coffee‚ tea‚ chocolate‚ soft drinks. Caffeine is a part of a family of drugs known as methylxanthines.To work‚ caffeine disrupts the neurotransmitter adenosine. Caffeine is known to cause physical dependence in humans
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Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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the two texts are more or less about the same subject‚ the way they approach their audience is very different. First of all‚ Text 1 aims more generally at older and historical-interested people‚ but also at those who would be interested in King George VI or the actors involved. Where text 2 was broadcasted all over Britain‚ to reach the whole of the British Empire‚ soldiers and families. However‚ their difference in audience‚ the one thing they do have in common is that both text 1 and 2 are trying
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puck of mass m initially at speed u collides head-on (without rotation) with a stationary puck of mass M. Find the velocities of both puck after the collision if: i) the collision is fully elastic ii) the collision if fully inelastic. i) momentum: kinetic energy: mu = mv+MV (+ve in direction of initial u) 1 /2 m u2 = 1/2 m v2 + 1/2 M V2 2 eqns in 2 unknowns: V = (u - v) m/M substitute in K eqn: u2 = v2 + (M/m) V2 = v2 + (M/m) (u - v)2 (m/M)2 = v2 + (u - v)2 (m/M) let ρ = (m/M) ⇒ v2 (1 + ρ) - 2ρ
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The genetic code A DNA (deoxyribonucleic acid) is composed of 4 different bases; adenine (A)‚ guanine (G)‚ cytosine (C) and thymine (T). Applying these 4 bases it may contain thousands of sequences within a single strand. Each of these bases makes a specific pairing with a corresponding base whereby the double helix structure is synthesised. This interaction is called base-paring and the complementary base pairs are; T pairs only with A and C only with G. Through this simple coding language‚ the
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CSVI Competency Statement VI To maintain a commitment to professionalism by conducting myself in a professional manner at all times. Every day I get to be part of all my students and their families lives and I hope to influence them with positive attitude‚ great energy and provide them with knowledge that they can use as building blocks for their future education .I have an understanding of my job expectations and every day I make decisions based on knowledge about age appropriate early
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Christian Alliance Cheng Wing Gee College S4 Biology Practical Worksheet Name: _____________________________ ( ) Class: ________ Date: _______________ Practical 5.1 Detection of food substances by food tests In the space below‚ write down the procedures of all the following food tests: Results A Test for glucose using Clinistix paper Sample Clinistix paper Original colour Final colour Glucose solution Distilled water B Test for reducing sugars using Benedict’s test
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HOW FAST ARE CHEMICAL REACTIONS? THEORY The study of reaction rates‚ how fast or how slow a reaction takes place‚ is known as chemical kinetics. The rate of chemical reactions varies greatly. Some reactions‚ such as the explosion of an atom bomb are uncontrollable. Reactions like the decay of radioactive carbon (14C) are so slow that it takes centuries to see any noticeable change. Between the two extremes are reactions that can be measured in the laboratory. There are several factors that
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EXPERIMENT-3 CHEMICAL KINETICS PREPARED BY BURAK COBAN PURPOSE: In this experiment we will study the rate of decomposition of hydrogen peroxide to form oxygen according to the net equation: 2H2O2 (aq) 2H2O(l) + O2 by measuring the rate at which oxygen evolved‚ we will investigate how the rate changes with varying initial concentrations of hydrogen peroxide and iodide catalyst. After we will study
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