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How can we reduce the environmental impact of industrial waste disposal techniques used by chemical manufacturing plants in order to ensure the safety of the surrounding ecosystems and communities?

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

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What is the enthalpy of formation of ammonia gas (NH3) at 298 K and 1 atm pressure using the given bond energies: N≡N = 418 kJ/mol, H-H = 436 kJ/mol, and N-H = 391 kJ/mol?

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

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What is the amount of heat energy required to melt 15 grams of ice at 0°C? The enthalpy 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 conductivity of a 0.1 M solution of sodium chloride at 25°C?

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

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How can we increase the presence of chemistry in our daily lives to promote better understanding and appreciation for the subject?

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

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How does the temperature affect the reaction rate and profitability of the reaction between hydrochloric acid and magnesium ribbon?

asked Feb 28 in Chemical kinetics by TheScientist (138k points)

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What is the amount of heat absorbed by a 50 g sample of water when it is heated from 20°C to 100°C? (Specific heat of water= 4.18 J/g·K)

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

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What is the heat of neutralization when 25 mL of 1.0 M hydrochloric acid (HCl) is added to 25 mL of 1.0 M sodium hydroxide (NaOH) solution? The temperature change of the resulting solution was recorded as 5.0°C.

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

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1 answer 103 views

How can we modify the synthesis methods for carbon nanotubes to achieve a longer tube length?

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

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What is the standard enthalpy change for the reaction that occurs when 50 ml of 0.1 M HCl is mixed with 50 ml of 0.1 M NaOH at 25°C? The equation for the reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l).

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

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What is the formal charge of the chlorine atom in the compound ClO3^-? Show your calculation and explain whether the chlorine atom has a positive or negative formal charge in this compound.

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

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1 answer 98 views

What is the formal charge of the central atom in the compound SF4 (sulfur tetrafluoride)? Show your calculation and explain whether the molecule is overall neutral or has a partial charge.

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

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What is the enthalpy change of ionization for a solution containing 0.1 mol of HCl (aq) if 20 kJ of heat is absorbed during the ionization process?

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

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What is the expected yield of benzocaine if 5 grams of p-aminobenzoic acid and 10 mL of ethanol are used in the preparation of benzocaine?

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

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What is the maximum amount of work that can be obtained from a reversible isothermal expansion of a gas at 25°C when the initial pressure is 4.00 atm and the final pressure is 1.00 atm and the initial volume of the gas is 3.00 L?

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

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1 answer 113 views

How does the average chain length and chain flexibility affect the thermodynamic behavior of polyethylene using Monte Carlo simulations?

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

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Sure, here is a precise problem for the student to solve:Calculate the heat capacity (in J/K) of a 50.0 g sample of an unknown substance that requires 167 J to increase its temperature by 5.00 °C.

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

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Sure, here's a problem for a chemistry student to solve:Calculate the acid dissociation constant (Ka) of a 0.1 M solution of acetic acid, given its pH is 3.7. The pKa value of acetic acid is 4.74.

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

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What is the maximum achievable monolayer coverage of a gas on a solid surface at a temperature of 25°C and a pressure of 1 atmosphere, given that the Langmuir constant is 0.05 L/mol?

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

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1 answer 97 views

What is the heat capacity of 25 grams of water if its temperature rises from 20°C to 50°C?

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

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