Aim: To determine the effect of altering concentration (mol dm-3) of hydrochloric acid (HCl) on the rate of reaction (mol dm-3 s-1) for the following chemical reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Research question: How does altering concentration (mol dm-3) of hydrochloric acid (HCl) affect the rate of reaction (g/s) for the following reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Background information: The reaction between calcium carbonate and hydrochloric acid
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crisis. In last few years‚ unemployment has become a serious and top most problem in many part of the world. Also increased globalizations have put more employee job into risk. The under developing countries like India‚ china are facing their bad time. Emerging economies like China and India are affected by the negative influence of the US Subprime Market Crisis. By reducing the demand for labor we can bring economic downturn‚ but it tends to increase the unemployment level in the formal sector
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The Rate Of Photosynthesis: Lab report 1) Construct a graph of your data 2) Using the graph‚ estimate the time at which 50 percent of the leaf disks were floating on the surface. The point at which 50 percent of the leaf disks are floating will be you point of reference for future investigations Using the graph the estimated time that roughly 50% of the leaf disks were floating on the surface was around the 10th minute. At the 10th minute our number rose up to
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Psychological Effects of Unemployment and Underemployment Individual and family consequences. Job loss is associated with elevated rates of mental and physical health problems‚ increases in mortality rates‚ and detrimental changes in family relationships and in the psychological well-being of spouses and children. Compared to stably employed workers‚ those who have lost their jobs have significantly poorer mental health‚ lower life satisfaction‚ less marital or family satisfaction‚ and poorer
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experiment is to determine the rate law and the activation energy for the reaction between persulfate ion‚ S2O82-‚ and iodide ion‚ I-: S2O82-(aq) + 2 I-(aq) 2 SO42-(aq) + I2(aq) The rate law can be written as Reaction rate = (1) Where m and n are the orders with respect to S2O82- and I-‚ respectively‚ and k is the rate constant. Determining the rate law involves determining the values of m and n. The temperature dependence of the rate constant is given by (2)
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for each company. Please show all numerical equations including numerator and denominator‚ not just a final number. Present your work in a comparative format using a table as illustrated: 1) Gross profit for 2008 PepsiCo Coca-Cola and Gross profit rate for 2008. 2) Percent change in operating income from 2007 to 2008. 3) Accounts receivable turnover for 2008. 4) Days sales in receivable for 2008. 5) Inventory turnover for 2008. 6) Days inventory on hand for 2008. 7) Increase (decrease)
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There are many sociologists over the last centuries who have great roles and contributions in the way society has changed the way people live in today’s society. Karl Marx is famous for developing the socio-politcal theory of Marxism in the 1840’s to 1880’s. He is said to be a founding father of sociology. This theroy has been important in social science and the socialist political movement. The power of his ideas have changed the way we look at the world today. He was very concerned with a person’s
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American Obesity Rises The obesity rate in America has increased tremendously within the past 20 plus years. People have become more comfortable being heavier than the average. Society tries to enforce the idea of “slim” being “in”‚ while somehow contradicting itself by saying being comfortable in your own skin. The obesity rate in America has increased because of cultural changes‚ lifestyle habits‚ and genetics. Over the past 20 years‚ American culture has changed as a whole. Working men and
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The purpose of this practical is to investigate how the pulse rate of humans changes when they exercise. Someone who is physically fit can supply their muscles with enough blood‚ carrying glucose and oxygen‚ for an activity at a lower heart and breathing rate. The fitter you are the lower your resting heart rate. You and your classmates will be the humans investigated. SAFETY: If you know you have any condition that affects you doing exercise‚ please make sure your teacher knows before you start
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Discussing why unemployment is such an important issue for governments and how it can be tackled in urban areas. AUTHORED BY Simon D. Ojera CONTENTS PAGE 1.0 Introduction…………....…………………………………….…………………………...1 2.0 The Concepts of Unemployment………………….……….…………………………….1 2.1 Definition..………………………………………………………………………...2 2.2 Causes of Unemployment…………………………...……………………….……3 3. Effects of Unemployment………………………… …………………………………...10 4. Tackling Unemployment in Urban
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