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[DOC File]Hunting The Elements Video Questions
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How much does a gold bar weight? How much money is a gold bar worth? What is copper combined with to make bronze? Bronze is an example of an alloy, what do you think alloys are? Why make bells out of bronze instead of copper? What determines what kind of element an atom is? More than 70% of the elements on the periodic table are what?
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[DOC File]THE SPECTROPHOTOMETRIC DETERMINATION
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7. In the copper-clad penny, the core contains 0.8% copper and 99.2% zinc by mass. Because we want to calculate the thickness of the copper layer on the core, you will need to subtract the mass of copper that is in the core from the total mass of copper that you determined spectrophotometrically.
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[DOCX File]Chemical Reactions of Copper and Percent Yield
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Weight approximately 0.500 g of no. 16 or no. 18 copper wire (1) to the nearest 0.0001 g and place it in a 250 mL beaker. Add 4-5 mL of concentrated HNO 3 to the beaker, IN THE HOOD. After the reaction is complete, add 100 mL distilled H 2 O. Describe the reaction (6) as to color change, evolution of gas, and change in temperature (exothermic ...
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[DOC File]Week 2, Lab 1: 9/15: Atoms
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15) How much energy does it take to melt an ice cube weighing 1.0 g and coming out of a freezer at -10oC? How much energy does it take for the resulting puddle of water to evaporate? Hvap H2O = 40.7 kJ/mol Hfus H2O = 6.02 kJ/mol. C H2O(s) = 2.06 J g-1 oC-1 C H2O(l) = 4.184 J g-1 oC-1
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Review Questions and Exercises
4. A roll of copper wire. 5. Wire Cutter. 6. Vernier Caliper. 7. Electronic balance (to measure mass of copper wire) 8. Graduated Cylinder. 9. Three cylindrical metals (brass, aluminum, copper, zinc, etc) 10. Irregular object (lead, steel, zinc, etc) PROCEDURE. Determine the mass of each cylinder, the copper wire and the irregular solid.
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[DOC File]Chapter 1 Problems - National Dong Hwa University
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By how much does the entropy of copper increase on heating from 300 to 1358 K? 3. Estimate the change in the equilibrium melting point of copper caused by a change of pressure of 10 kbar. The molar volume of copper is 8.0(10-6 m3 for the liquid, and 7.6(10-6 m3 for the solid phase. The latent heat of fusion of copper is 13.05 kJ/mol.
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[DOC File]AVOGADRO'S NUMBER WORKSHEET
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2. How many atoms of copper are there in 1.00 kg of pure copper? 3. How much would 3.42 X 1023 formula units of mercuric oxide weigh in grams? 4. Which would weigh more--6.54 X 1022 formula units of aluminum chloride or 7.34 X 1022. formula units of stannous fluoride? 5. How many molecules are present in 0.00115 grams of carbon dioxide? 6.
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[DOC File]Moles of Iron and Copper
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2. What does it mean to be aqueous? The iron nails and an empty beaker will be weighed before the reaction takes place. The nails will be cleaned of copper after the reaction ceases, dried and then re-weighed. We expect their weight to go down. The beaker, containing copper metal, will have the solution decanted and the copper will be washed.
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[DOC File]WordPress.com
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A) How much can you lift using a 2.0-m long wheelbarrow? Assume that the wheelbarrow weighs 80 N and that its center of gravity is 0.70 m from the wheel. Assume that the load carried in the wheelbarrow is also 0.70 m from the wheel. B) Where does the force come from to enable you to lift more than 450 N when you use the wheelbarrow? Elasticity
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[DOC File]Density Calculations Worksheet I
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3. What is the weight of the ethanol that exactly fills a 300.0 mL container? The density of ethanol is 0.629 g/mL. 300.0 mL x 0.629 g/mL = 189 g. 4. A rectangular block of copper metal weighs 1596 g. The dimensions of the block are 6.4 cm by 7.5 cm by 4.8 cm. From this data, what is the density of copper? (hint: find the volume of a block first)
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How much does copper weight