IRON (METAL) Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole‚ forming much of Earth’s outer and inner core. It is the fourth most common element in the Earth’s crust. Iron’s very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars‚ Like other group 8 elements‚ iron
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Biochemistry Unit The Kinetics of Alkali Phosphatase Inhibition 1. OVERVIEW This practical builds on the enzymology lab skills you learned in the Acid Phosphatase practical. Again‚ you will measure the initial reaction velocity (V 0) of an enzyme reaction‚ but this time in the absence and then presence of an inhibitor. Last time you used Acid Phosphatase (Prac 1)‚ but this time you will use the enzyme Alkali Phosphatase. These enzymes have different primary (and hence tertiary) structures
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Hydrogen Fuel Cells There are many reasons to look for new cleaner forms of energy. Fossil fuels‚ being non-renewable‚ will eventually run out. Pollution from burning fossil fuels destroys our environment. Hydrogen fuel cells could be used many places where fossil fuels are currently being used. Using hydrogen as a form of energy can not only reduce our dependence on imported oil‚ but also benefit the environment by reducing emissions of greenhouse gases and pollutants that affect our air quality
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Year 8 geography- global organization. Part A Organization 1 amnesty international a) what is Amnesty international Amnesty international is a democratic organization which is not funded by the government or other political party that complains to the government or other organizations for abusing human rights or falling to protect people. Plus amnesty international defends human rights for people whenever there are violated. b) what does amnesty international do The things that amnesty international
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ecosystems. To understand the rates in which certain species’ leaves decay and release the energy stored within them can demonstrate how quickly the energy becomes available to organisms in higher trophic levels. Between plant species the rate of decomposition varies according to leaf structure‚ chemical or physical defence and whether the species is allochthonous or autochthonous. Native species adapt to the predators that feed upon them and the same applies for the predators‚ adapting to the plants
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The Enthalpy Change of the Decomposition of Calcium Carbonate _INTRODUCTION_ RESEARCH QUESTION: What is the enthalpy change of the decomposition of calcium carbonate? BACKGROUND: Enthalpy in chemistry can be thought of as the energy contained within the bonds‚ or the internal energy‚ but it is not heat and you can only measure changes in it. When bond bonds break in the reactants energy is given off‚ when bonds form‚ energy is absorbed. If the energy absorbed is less than the energy released
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F7 Essay Writing (Kinetics) Q. Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. Outlines: (I) Factors affecting the Rate of Reaction (a) temperature ---- collision of molecules with different velocities and kinetic energies ---- Collision Theory and Maxwell-Boltzmann distribution ---- Arrhenius equation and Activation energy (b) concentration ---- frequency of collisions and effective collisions
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Kinetic Theory - Worksheet 1. State three (3) assumptions of the kinetic theory as it relates to gases. [3] ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 2. The kinetic theory assumes that all gases are ideal‚ however‚ this does not exist in reality. a. State the conditions under which gases deviate from ideal behaviour and explain
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Kinetic Molecular Theory Basic Concepts The gas laws developed by Boyle‚ Charles‚ and Gay-Lussac are based upon empirical observations and describe the behavior of a gas in macroscopic terms‚ that is‚ in terms of properties that a person can directly observe and experience. An alternative approach to understanding the behavior of a gas is to begin with the atomic theory‚ which states that all substances are composed of a large number of very small particles (molecules or atoms). In principle‚ the
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Part B Now‚ suppose that Zak’s younger cousin‚ Greta‚ sees him sliding and takes off her shoes so that she can slide as well (assume her socks have the same coefficient of kinetic friction as Zak’s). Instead of getting a running start‚ she asks Zak to give her a push. So‚ Zak pushes her with a force of 125 \rm N over a distance of 1.00 \rm m. If her mass is 20.0 \rm kg‚ what distance d_2 does she slide after Zak’s push ends? Remember that the frictional force acts on Greta during Zak’s push and
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