Chemistry

Lab: Limiting Reactant and Percent Yield Student GuidePre-Lab InformationPurpose Explore the yield of a chemical reaction by identifying the limiting reactant, comparing the theoretical and actual yields, and explaining the sources of error.Time Approximately 45 minutesQuestion While observing a chemical reaction, how can you tell which reactant is limiting?Reaction The reaction of copper(II) chloride and aluminum is shown in this balanced equation:3CuCl2 + 2Al 2AlCl3 + 3CuHypothesis If a substance is the limiting reactant, then it will be fully consumed by the time the reaction completes because it is the reactant that reacts completely and the reaction cannot proceed further.Summary You will react copper(II) chloride with different quantities of aluminum in two trials. You will also calculate percent yield for Trial 2.
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what plate boundary typically causes earthquakes
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What causes the release of energy in an exothermic reaction? Bonds breaking Bonds breaking A catalyst A catalyst Bonds being formed Bonds being formed Electrons escaping the bond
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PLEASE HELP ME WITH PHYSICAL SCIENCE!! PRETTY EASY QUESTION
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Calculate the concentration of hydrochloric acid if 50.0 mL of hydrochloric acid is neutralized by 25.0 mL of 2.0 M sodium hydroxide. The neutralization reaction is shown below HCl + NaOH > H2O + NaCl
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Which change of phase is most likely occurring in the beaker
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An object was measured by a worker as15.9cm long, however, the manufacturerspecifications list the length of the object at15.8cm. What is the percent error in theworkers measurement?
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Aspirin can be prepared from salicylic acid ( C 7 H 6 O 3 CX7HX6OX3), which has a molar mass of 138.12 g/mol, and acetic anhydride ( C 4 H 6 O 3 CX4HX6OX3), which has a molar mass of 102.04 g/mol. The density of acetic anhydride is 1.082 g/mL. C 7 H 6 O 3 + C 4 H 6 O 3 C 9 H 8 O 4 + C 2 H 3 O 2 CX7HX6OX3+CX4HX6OX3CX9HX8OX4+CX2HX3OX2 What is the theoretical yield, in grams, of aspirin ( C 9 H 8 O 4 CX9HX8OX4), which has a molar mass of 180.15 g/mol, possible when reacting 3.20 g of salicylic acid with 3.71 mL of acetic anhydride? Type answer:
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PLEASE ANSWER!!!!!!!! Scientists observe the polyatomic ion nitrate forming a compound with unknown element 'A' and predict that the chemical formula could be A2NO3. One of the scientists, Nadeen, states that this chemical formula would be impossible. Is Nadeen correct? Explain why or why not.
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The map shows watersheds with a high potential for soil, nitrogen, and pesticide runoff. If you were in charge of handling the problem of pollution from surface runoff in US watersheds, what would you need to know to help you come up with a solution? Write down at least five questions you would ask an expert to help you understand the data shown in the map and design a solution to the problem.
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Describe how temperature changes the average Molecular kinetic energy?
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11. The modern periodic table is arranged in order of increasing atomicO radiusO chargeO numberO mass
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When Mercury orbits the Sun, it gets as close as 4.8 x 107 miles to the Earth. It gets as far as 1.38 x 108 miles to the Earth. What is the difference of these two distances
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Mg(OH)2 + 2HNO3 Mg(NO3)2 + 2H20If 375.96 grams of H20 are produced, how many grams of HNO reacted? PLS NO LINKS AND ILL GIVE BRAINLIEST
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How are bird bones adapted for flight?1. They are thin.2. They are hollow.3. They are strong.4. Birds do not have many bones.
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6.73 moles of h2o will have a mass of how many grams h2o
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A 1.5 L pocket of air with a temperature of 295 K rises in the atmosphere. What will be the volume of the air pocket of the t temperature decreased to 2 celsius and the pressure is not changed.
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6. If 4 grams of salt is dissolved in 79 grams of water, what is the total mass of the final solution? [1 mark]a) 83gb)4gc) 79gd) 81g
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what are the respective coefficients needed to balance the equation below _N2(g) + _H2(g) --> _NH3(g)
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3. how many moles are present in 10.0 g of aluminum(Al)
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Read the temperature in the image: Is it 18.7?
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N 2H 4 + H202 N2 + H 20
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What is the volume of 40.0 grams of argon gas at STP ?
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