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What is the surface area of a sample of activated carbon that adsorbs 2.5 moles of nitrogen gas at 77 K and a pressure of 1 atm according to the BET theory? The sample weight is 3 grams and the molecular weight of nitrogen is 28 g/mol.

asked Mar 1 in Surface Chemistry by TheScientist (138k points)

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What is the Gibbs free energy change for the electrochemical reduction of 1 mol of Au3+ to Au in a standard electrochemical cell with a cell potential of 1.42 V at 298 K?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the standard enthalpy change for the neutralization of 25.0 mL of 0.100 M hydrochloric acid with 25.0 mL of 0.100 M sodium hydroxide, given that the specific heat capacity of the solution is 4.18 J/g°C and the temperature change is 5.0°C?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the yield of 2,4,6-trinitrotoluene that can be obtained if 500 mL of toluene is mixed with 700 mL of nitric acid (concentration 65%) and the reaction is carried out for 2 hours at a temperature of 60°C?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the standard enthalpy change for the fusion reaction of 10.0 grams of solid water (H2O) at 0°C into liquid water at 0°C, given the standard enthalpy of fusion for water is 6.01 kJ/mol?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the pH level of a 0.1 M solution of hydrochloric acid (HCl) measured using a pH meter?

asked Mar 1 in Analytical Chemistry by TheScientist (138k points)

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What is the heat required to raise the temperature of 50 grams of water by 10 degrees Celsius? The specific heat capacity of water is 4.18 J/g °C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the standard enthalpy change for the fusion of 10 grams of ice at 0°C to liquid water at 25°C? Given the standard enthalpy of fusion for ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g°C.

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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How can we reduce greenhouse gas emissions from transportation sources, such as cars and airplanes, through the use of alternative fuels and technologies in order to mitigate the impact of global warming?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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What is the enthalpy change for the following chemical reaction?2H2 (g) + O2 (g) → 2H2O (l)Given the enthalpy of formation values:ΔHf°(H2O) = -285.8 kJ/molΔHf°(H2) = 0 kJ/molΔHf°(O2) = 0 kJ/mol

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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How can we increase the exposure to chemistry in everyday life for individuals who are not enrolled in chemistry courses?

asked Mar 1 in Chemical education by TheScientist (138k points)

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How can we design a chemical process to efficiently produce a high-quality, environmentally-friendly water-based paint with desired properties such as gloss, durability, and pigment dispersion?

asked Mar 1 in Chemical engineering by TheScientist (138k points)

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What is the enthalpy change, in kilojoules per mole, when 6.0 grams of potassium chloride (KCl) is dissolved in 200.0 mL of water at 25°C? The molar heat of dissolution of KCl is -57.3 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the standard enthalpy change for the vaporization of 10 g of water at a temperature of 100°C and atmospheric pressure?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the molar mass of sodium chloride (NaCl)? Show step-by-step calculations in determining the answer.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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How does the use of different polymer electrolytes affect the performance of solid-state lithium-ion batteries?

asked Feb 28 in Polymer Chemistry by TheScientist (138k points)

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What is the molar mass of ammonium sulfate ((NH4)2SO4)? Round your answer to the nearest hundredth of a gram.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the heat of formation (in kJ/mol) of methane (CH4) from its elements carbon (C) and hydrogen (H2) at standard conditions (25°C and 1 atm)? Use the following data for the bond energies: C-H = 414 kJ/mol, H-H = 436 kJ/mol, and C-C = 348 kJ/mol.

asked Mar 1 in Chemical bonding by TheScientist (138k points)

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What is the heat of crystallization when 50 grams of water is frozen to form ice at a temperature of -10°C? (Assuming the heat capacity of water is 4.184 J/g°C and the heat of fusion of water is 6.01 kJ/mol)

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the theoretical yield of acetylsalicylic acid that can be obtained from the reaction of 5 grams of salicylic acid and 10 mL of acetic anhydride, assuming complete reaction and 100% yield?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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