1) Empirical study-a study that uses tangible observations. The data collected comes from physical means that are concrete and use the senses to gather data. (McMillian‚ 2016‚ p.7) Example: Empirical studies can be quantitative or qualitative; in research involving retention efforts they will be empirical studies conducted to gather data. 2) Theory- is an educated assumption that explains how‚ what we as researchers examine relate to each other. It creates meaning from the information gathered. McMillian
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Empirical Formula of a Compound * Purpose: To determine the empirical formula of Magnesium Chloride. * Data 1. Mass of evaporating dish = 45.08g 2. Mass of evaporating dish and Magnesium = 45.17g 3. Mass of Magnesium: { 2 } – { 1 } = 0.09 4. Mass of evaporating dish and Magnesium Chloride First weighing = 45.48g (After heating and cooling) second weighing = 45.49g 5. Mass of Magnesium Chloride: { 4} – { 1 } = 0.41g
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What is the empirical formula of a compound that contains 75% Ag and 25% Cl by mass? AGCL Calculate the approximate number of molecules in a drop of water with a mass of 0.10 g. 3 x 1021 molecules What is the percentage composition of CaSO4? 29.44% Ca‚ 23.55% S‚ 47.01% O What mass of calcium bromide is needed to prepare 150.0 mL of a 3.50 M solution? (Assume that the molecular weight of CaBr2 is 200.618 g/mol) 105 g Nitrous oxide (N2O)‚ or laughing gas‚ is commonly used as an anesthetic
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Empirical and Molecular Formula | Key Concepts * Empirical Formula of a compound shows the ratio of elements present in a compound. * Molecular Formula of a compound shows how many atoms of each element are present in a molecule of the compound. * The empirical formula mass of a compound refers to the sum of the atomic masses of the elements present in the empirical formula. * The Molecular Mass (formula mass‚ formula weight or molecular weight) of a compound is a multiple of the empirical
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of nitrogen gas?(2.8 mol) EMPIRICAL FORMULA WORKSHEET 1. What is the empirical formula for a compound which contains 0.0134 g of iron‚ 0.00769 g of sulfur and 0.0115 g of oxygen? (FeSO3) 2. Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine. (CrCl3) 3. NAME the compound which contains 0.463 g Tl (#81)‚ 0.0544 g of carbon‚ 0.00685 g of hydrogen and 0.0725 g of oxygen by finding its empirical formula. (TlC2H3O2)
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Social Identity Theory making reference to empirical research studies What is the Social Identity Theory? Social identity theory is the idea that we‚ as humans‚ have the need to categorize ourselves into in-groups ‘us’ and out-groups ‘them’ in order to give ourselves a positive social identity to protect and enhance our self-esteem. Empirical research done to support this theory Tajfel H. (1970) One of the most well known studies done to support social identity theory was the minimal
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Steven Leung 9/19/06 Lab Report The Empirical Formula of a Copper Oxide Purpose: To convert an unknown copper oxide to copper (Cu) metal using natural gas to provide a reducing environment as shown below: Cu O (s) + CH (g) ¨ Cu (s) + Co (g) + H O (g) From the mass difference between the unknown copper oxide and the Cu metal generated at the completion of the reaction and the molar mass of Cu and oxygen‚ the empirical formula of the original copper oxide can be calculated. Materials:
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essential that the structure is derived. Firstly it is important to determine the percentage composition of elements to work out the empirical formula. The empirical formula was found to be C10H12O and the mass of the unknown was 148.09 m/z which when calculating the molecular weight of the empirical formula it did equal 148.09 g mol -1. This means that the empirical formula is also the molecular formula. As 12.01x10 carbons +1.008x12 hydrogens + 16= 148.09 09 g mol -1. From this knowledge the unknown
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The Speculative Voice (Huxly vs Niccols) - Elliott Dooley The purpose of the speculative voice is to not only to warn people of inhumane trends developing into widely accepted culture but also to make people reconsider the whole idea of a "utopian society". The idea that a world can be a place of perfect equality between all humans and still have stability is an idea that if put into practice is sure to fail and cause upheaval and possibly the demise of humanity itself. A composer’s outlook on creativity
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Alcoholism: Supported by Empirical Research Ellie Smith Vanderbilt University Abstract Globally‚ alcohol abuse disorders have become a problem for seventy-six million people (Orford‚ Natera‚ Copello‚ Atkinson‚ 2005). Addiction is a disease‚ not merely a social disorder. The disease not only affects the inflicted individuals‚ but can also be detrimental to family members and the greater community. Causes of addiction can be grouped into three categories: psychological traits
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