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tj

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Now you need to put handles on your cookware! You have five different options, including metals and nonmetals such as wood. Based on specific heat, which material would be the best choice? the material with the smallest...
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Check all items that you used, either directly or indirectly, each time you did this computation. the first law of thermodynamics (heat lost by a metal equals the heat gained by the water) the ability of heat to flow fro...
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Concerning the disposal of materials at the end of the experiment, which methods are safe? Check all that apply. Dump the acids and bases down the drain so they can be combined with sewer water. Dispose of pH paper in th...
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Which statements describe proper use of a filter funnel? Check all that apply. Cut the filter paper in half before placing it in the funnel. Fold the filter paper in fourths before placing it in the funnel. Pour all the...
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Which methods will help you properly identify pH with indicator paper? Check all that apply. Set a piece of pH paper in front of each solution before testing to keep organized. Dip the pH paper into each test tube and la...
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0.01 M HCl solution has a pH of 2. Suppose that during the experiment, both the universal pH indicator and the cabbage indicator turn orange-red for 0.01 M HCl. What can you conclude about the the cabbage indicator key?...
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During the lab, you will have access to a range of acids and bases as well as universal pH indicator paper. Think about how you can use these tools to develop a color chart for the red cabbage indicator. Then, write a hy...
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It is important for scientists to know how much energy is given off or absorbed in a chemical reaction. Which options below would indicate an exothermic reaction? mr001-1.jpgH = – mr001-2.jpgH = + Energy is considered a...
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The enthalpy of combustion for octane (C8H18(l)), a key component of gasoline, is –5074 kJ/mol. The reaction equation is: C8H18(l) + 12.5O2(g) es001-1.jpg 8CO2(g) + 9H2O(g). What is the es001-2.jpgHf for this reaction? 1...
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What is the enthalpy of combustion when 1 mol C6H6(g) completely reacts with oxygen? 2C6H6(g) + 15O2(g) mc001-1.jpg 12CO2(g) + 6H2O(g) –6339 kJ/mol –3169 kJ/mol 1268 kJ/mol 6339 KJ/mol
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What is the enthalpy of reaction for the decomposition of calcium carbonate? CaCO3(s) Right arrow. CaO(s) + CO2(g) kJ
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Which of these statements are true? Select all that apply. The Delta.Hf for Br2(I) is 0 kJ/mol. The Delta.Hf for He(I) is 0 kJ/mol. The Delta.Hf for Hg(I) is 0 kJ/mol. The Delta.Hf for Cl2(g) is 0 kJ/mol. The Delta.Hf fo...
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Using the information in the table to the right, calculate the enthalpy of combustion of 1 mole of acetylene for the reaction: 2Ces001-1.jpgHes001-2.jpg + 5Oes001-3.jpg es001-4.jpg 4COes001-5.jpg + 2Hes001-6.jpgO kJ/mol
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Which substances have Delta.Hf = 0 kJ/mol by definition? Select all that apply. O2(g) N(g) H2O(l) Br2(l) Fe(s) He(g)
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Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4? Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O. 2 upper H sup...
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Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4? Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O. 2 upper H sup...
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An acid (X) reacts with a base (Y) to produce Mg3(PO4)2. What are X and Y? X = H3PO3; Y = Mg(OH)2 X = H3PO4; Y = Mg(OH)2 X = H3PO4; Y = Ca(OH)2 X = H3PO3; Y = Ca(OH)2
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Consider the total ionic equation below. 2 upper H superscript plus, plus upper C r upper O subscript 4 superscript 2 minus, plus upper B a superscript 2 plus, plus 2 upper O upper H superscript minus right arrow upper B...
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dentify the spectator ions in this reaction. Check all that apply. 2H+ + CO32– + 2Na+ + 2OH– mr001-1.jpg 2Na+ + CO32– + 2H2O H+ CO32– Na+ OH– 2H2O
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Identify the spectator ions in this reaction. Check all that apply. H+ + CN– + Li+ + OH– mr001-1.jpg Li+ + CN– + H2O H+ CN– Li+ OH– H2O
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Identify the spectator ions in this reaction. Check all that apply. 2H+ + CrO4– + Ba2+ + 2OH– mr001-1.jpg Ba2+ + CrO4– + 2H2O H+ CrO4– Ba2+ OH– 2H2O
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What is the total ionic equation for the following reaction? HCN + LiOH mc001-1.jpg H+ + OH– mc001-2.jpg H2O CN– + Li+ mc001-3.jpg Li+ + CN– H+ + CN– + Li+ + OH– mc001-4.jpg Li+ + CN– + H2O
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What is the net ionic equation for the following reaction? H2CrO4 + Ba(OH)2 H2CrO4– + 2OH– mc001-1.jpg CrO4– + 2H2O 2H+ + CrO4– + 2OH– mc001-2.jpg CrO4– + 2H2O H+ + OH– mc001-3.jpg H2O
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What is the total ionic equation for the following reaction? H2CrO4 + Ba(OH)2 H2CrO4– + 2OH– mc001-1.jpg CrO4– + 2H2O 2H+ + CrO4– + 2OH– mc001-2.jpg CrO4– + 2H2O 2H+ + CrO4– + Ba2+ + 2OH– mc001-3.jpg Ba2+ + CrO4– + 2H2O
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Which of these descriptions are properties of salts? Check all that apply. are formed by the reaction of two acids are covalent bonds dissociate in water are electrolytes have low conductivity are a product of a neutrali...
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