carbon dioxide (gas): NaHCO. +HCHO, → Na,C,H₂O + H₂O + CO₂ 8. The following reaction between potassium permanganate (KMnO,) and manganese sulfate in water produces man- ganese dioxide, potassium sulfate, and sulfuric acid: KMnO4+MnSO4 + H₂O → MnO₂ + K₂SO4 + H₂SO4 [For each compound, construct a vector that lists the numbers of atoms of potassium (K), manganese, oxygen, sulfur, and hydrogen.] 9. [M] If possible, use exact arithmetic or rational format for calculations in balancing the following chemical reaction: PbN6+ CrMn₂08 → Pb3O4 + Cr₂O3 + MnO2 + NO 10. [M] The chemical reaction below can be used in some indus- trial processes, such as the production of arsene (AsH₂). Use exact arithmetic or rational format for calculations to balance this equation. MnS + As₂Cr10035 + H₂SO4 11. Find the general flow pattern of the network shown in the figure. Assuming that the flows are all nonnegative, what is the largest possible value for x3? 20- h → HMnO4 + AsH3 + CrS3012 + H₂O 80- XI A с X3 X₂ B X4 12. a. Find the general traffic pattern in the freeway network shown in the figure. (Flow rates are in cars/minute.) Describe the general traffic pattern when the road whose

carbon dioxide (gas): NaHCO. +HCHO, → Na,C,H₂O + H₂O + CO₂ 8. The following reaction between potassium permanganate (KMnO,) and manganese sulfate in water produces man- ganese dioxide, potassium sulfate, and sulfuric acid: KMnO4+MnSO4 + H₂O → MnO₂ + K₂SO4 + H₂SO4 [For each compound, construct a vector that lists the numbers of atoms of potassium (K), manganese, oxygen, sulfur, and hydrogen.] 9. [M] If possible, use exact arithmetic or rational format for calculations in balancing the following chemical reaction: PbN6+ CrMn₂08 → Pb3O4 + Cr₂O3 + MnO2 + NO 10. [M] The chemical reaction below can be used in some indus- trial processes, such as the production of arsene (AsH₂). Use exact arithmetic or rational format for calculations to balance this equation. MnS + As₂Cr10035 + H₂SO4 11. Find the general flow pattern of the network shown in the figure. Assuming that the flows are all nonnegative, what is the largest possible value for x3? 20- h → HMnO4 + AsH3 + CrS3012 + H₂O 80- XI A с X3 X₂ B X4 12. a. Find the general traffic pattern in the freeway network shown in the figure. (Flow rates are in cars/minute.) Describe the general traffic pattern when the road whose

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.19QAP

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A student dissolves 10.3g of ammonium nitrate NH4NO3 in 300.g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0°C to 19.3°C over the course of 3.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4NO3s -> NH+4aq + NO−3aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3.
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