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Chemistry 102
July 2023
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Chemistry 102
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July 13, 2023
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July 13 of 2023
3750 J of heat were added to sample of magnesium with an unknown mass if the temperature of the sample increased by 23 degrees Celsius, what is the mass of the sample? (The specific heat of magnesium is 1.02 J/g degrees Celsius)
What is the change in temperature if 500 J heat are added to a 23 g sample of silver? (The specific heat of silver is 0.24 J/g degrees Celsius)
How much heat must be added to a 34.2 h sample of aluminum in order to raise the temperature of the aluminum 34 degrees Celsius? (the specific heat of Aluminum is 0.9j/g degrees Celsius.
For each of the four solutions you prepared and studied report the formal concentration, the measured pH, the actual calculated concentrations for all the substances (products and reactants) involved in the reaction, and the % ionization of the acetic acid. Present this data in a table.
Manganese reacts hydrologic acid in this balanced equation: Mn+2HCl=MnCl2+H2. ?H = +221 kj/ mol A. Is this reaction endothermic or exothermic? B. If 12.5 g Mn is reacted, how much energy is released or absorbed?
Hydrogen peroxide decomposes in this balanced equation: 2H2O2= H2O +O2. ?H = 200 kj/mol A. Is this reaction endothermic or exothermic? B. If 5.6 g H2O2 is decomposed, how much energy is released or absorbed?
The combustion of methanol occurs in this balanced equation: 2CH3OH + 3O2 = 2CO2 + 4H2O ?H = -715 kj/mol A. Is this reaction endothermic or e other mic? B. If 98.3 g of CH3OH is combusted, how much energy is released or absorbed
O Ãon benzoato é a base conjugado do ácido benzóico, uma solução de benzoato de sódio 0,02 mol/l tem ph 8,25. Qual o pkb e a fração dissociada?
2moles of an ideal gas at 10atm and 23c is expanded
how entropy of system changes during egg development
(i) Use group theory to determine the representation for the mode motion. (ii) Reduce the representation, showing your work, and identify th translational, rotational and vibrational modes.
Answer to the attached image.
Distinguish between moisture content, water content and the feed water supply straight to the ball mill? Is the water contents of olivine the same as the feed water supply to the ball mill?
Answer to attached image.
The mass flowrate of the feed olivine entering the ball mill is 75000 kg/hr. Feed olivine will go into ball mill along with water. Ball mill inlet with particles size is 400 microns. Assume the particles from the output of the ball mill will have the size that particles with size 10 microns…
Answer to attached image.
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Consider the unbalanced redox reaction occurring in an acidic solution: Cr2O2−7(aq)+Cu(s)→Cr3+(aq)+Cu2+(aq) Balance the equation.
A dilute bleach sample containing Ca(OCI) was prepared by quantitatively diluting 25.00 mL stock bleach to 250mL using a volumetric flask. 25 mL aliquot of the diluted bleach solution was titrated using the previously standardized Na2S2O3 (Molarity = 0.0839). 50 mL of distilled water2.0 g of…
A solution of Na2S2O3 (FW=158.11) was standardized with 25.00 mL 0.01150 M KIO3 (FW = 214.01). 25 mL of distilled water, 2.0 g of solid KI and 10 mL of 0.100 M H2SO4 were added to liberate 12. The liberated 12 required 18.05 mL Na2S2O3 to reach the pale yellow solution after which starch was…
a solution containing 0.450 moles of Ce+4. Calculate the milliequivalents of Ce+4
c4h8+6O2->4co2+4h3o determine the molar composition of the product
differentiate between the formation of precipitate by nucleation and formation of of precipitate by particle growth
answer number 1
Use standard thermodynamic data (in the Chemistry References) to calculate G at 298.15 K for the following reaction, assuming that all gases have a pressure of 10.33 mm Hg. CO(g) + Cl2(g) ---> COCl2(g)
Calcium carbonate decomposes in this balanced equation: CaCO3 = CaO + CO2. ΔH = +110 kJ/mol A. Is this reaction endothermic or exothermic? B. If 45.3g of CaCO3 is decomposed, how much energy is released or absorbed
3750 J of heat were added to sample of magnesium with an unknown mass if the temperature of the sample increased by 23 degrees Celsius, what is the mass of the sample? (The specific heat of magnesium is 1.02 J/g degrees Celsius)
What is the change in temperature if 500 J heat are added to a 23 g sample of silver? (The specific heat of silver is 0.24 J/g degrees Celsius)
How much heat must be added to a 34.2 h sample of aluminum in order to raise the temperature of the aluminum 34 degrees Celsius? (the specific heat of Aluminum is 0.9j/g degrees Celsius.
Manganese reacts hydrologic acid in this balanced equation: Mn+2HCl=MnCl2+H2. ?H = +221 kj/ mol A. Is this reaction endothermic or exothermic? B. If 12.5 g Mn is reacted, how much energy is released or absorbed?
Hydrogen peroxide decomposes in this balanced equation: 2H2O2= H2O +O2. ?H = 200 kj/mol A. Is this reaction endothermic or exothermic? B. If 5.6 g H2O2 is decomposed, how much energy is released or absorbed?
The combustion of methanol occurs in this balanced equation: 2CH3OH + 3O2 = 2CO2 + 4H2O ?H = -715 kj/mol A. Is this reaction endothermic or e other mic? B. If 98.3 g of CH3OH is combusted, how much energy is released or absorbed
Answer to the attached image.
Answer to attached image.
Answer to attached image.
Consider the unbalanced redox reaction occurring in an acidic solution: Cr2O2−7(aq)+Cu(s)→Cr3+(aq)+Cu2+(aq) Balance the equation.
a solution containing 0.450 moles of Ce+4. Calculate the milliequivalents of Ce+4
Use standard thermodynamic data (in the Chemistry References) to calculate G at 298.15 K for the following reaction, assuming that all gases have a pressure of 10.33 mm Hg. CO(g) + Cl2(g) ---> COCl2(g)
Calcium carbonate decomposes in this balanced equation: CaCO3 = CaO + CO2. ΔH = +110 kJ/mol A. Is this reaction endothermic or exothermic? B. If 45.3g of CaCO3 is decomposed, how much energy is released or absorbed