Lab #4: Aqueous Reactions Introduction: In this experiment we studied the two different types of aqueous chemical reactions‚ double replacement and single replacement. In a double replacement reaction one or both of the products is an insoluble ionic compound or otherwise known as a precipitate; or a non-electrolyte; or a gas. In a single replacement reaction there is typically a metal and an ionic compound consisting of a metal cation and a non-meatl anion. Singel replacement ractions occur when
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the teacher and found out what was each student struggle and changed them and made each student unite and relate to each other. this action called freedom writer helped gain and start off a new society furthermore‚ the students who perceived school as they don’t need it realized they did need it and it is important. this movie also changed the racism act and made African Americans and white people relate and connect with each other. what this whole paragraph demonstrates is there was alot of changing
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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 is an example of a neutralization reaction between an acid and a base. Neutralization reactions involve
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Abstract “Reaction Time” is the interval of time between the application of a stimulus and the detection of a response and has been thought to differ based upon the effects of modality and warning signals. In the “Reaction Time” experiment a total of 24 students from the University of Cincinnati participated in an experiment consisting of two sensory modalities‚ audition and vision‚ which were combined with two levels of warning signal status. The two levels of warning signal status were signal
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Strike action A strike is a collective withdrawal of labour by employees. Under such action‚ employees refuse to perform all work‚ not just selected duties. Strikes are usually‚ but not always‚ organised by a union. The purpose of a strike is to pressure an employer (or other third party) into complying with particular demands or refraining from doing something. Under the federal Fair Work Act 2009 strike action may be ’protected action’ if undertaken during a bargaining period for an enterprise
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North Africa: World War II In 1941‚ Australians fought in the North African lands of Libya and Egypt. The Australian Imperial Force (AIF) divisions 6‚ 7 and 9 fought in those countries. Royal Australian Navy (RAN) ships served in the eastern Mediterranean and the Royal Australian Air Force provided air support. Australians fought their first major land battle in World War II on January 1941‚ when men of the 6th Division AIF‚ and other Allied troops‚ battled Italian forces at the town of Bardia
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High School Students’ Conceptions about Energy in Chemical Reactions (focusing only in exothermic and endothermic reactions). Aim The aim of this study is to investigate students’ understanding of the energy concept in chemical reactions particularly in endothermic-exothermic reactions. Both qualitative and quantitative methodology was used for this investigation. A twenty-item multiple choice test was developed about the topic to measure the students’ understandings. This concept test was
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References: Johnson‚ A.P.‚ (2008). A Short Guide to Action Research. San Francisco: Pearson and Ally and Bacon. Macbeth‚ D. (2000). On an Actual Apparatus for Conceptual Change. John Wiley & Sons‚ Inc. Sci Ed 84‚ 228–264. Mason‚ L. and Boscolo‚P. (2000). Writing and conceptual change. What changes? Instructional
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Affirmative Action Affirmative action has increased the number of minorities in workplaces and in universities. It has helped and hurt people since it was put into effect on March 6th‚ 1961. The Catholic Church has weighed in its opinion on affirmative action also. Affirmative action has given minorities more opportunities than they would’ve had before. From 1990 to 2006‚ the number of minorities that received a masters’ degree increased roughly 65%. Part of this can be attributed to affirmative
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TEAMWORK IN ACTION Retail store that sells music CDs 1. In retail store that sell music CDs‚ the single measure best reflects the overall level of activity is Number of CDs sold. - In respect to changes in the measure of CDs sold‚ a variable cost is a cost that varies‚ in total‚ in direct proportion while a fixed cost remains unchanged‚ in total‚ regardless of any change. ->Examples of fixed and variable costs in respect to small changes in the measure of selling CDs: Cost | Cost
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