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What is the molar mass of Calcium Carbonate (CaCO₃)? Show your calculations.

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

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What is the change in enthalpy (in kilojoules) for the combustion reaction of methane (CH4) at standard conditions (298 K, 1 atm)?

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

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What is the activation energy in Joules for a chemical reaction that has a rate constant of 2.7 x 10^-3 s^-1 and a temperature of 298 K? The activation energy can be calculated using the Arrhenius equation.

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

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How does the use of different monomers affect the adhesive properties of polymers on different surfaces?

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

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What is the efficiency of an electrochemical cell that operates with a potential difference of 1.5V and has a maximum electrical work output of 2500 J when 10 moles of electrons are transferred in the cell reaction? (Assuming no other energy losses)

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

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One potential question for a student studying rearrangement reactions in organic chemistry is: What is the mechanism by which a Wagner-Meerwein rearrangement occurs and give an example of a molecule that undergoes this type of rearrangement?

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

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How can we accurately predict the behavior and properties of a particular molecule using computational methods, and what are the potential applications of this information in fields such as drug design and materials science?

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

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How can we accurately measure the concentration of heavy metals in soil samples and determine their potential toxicity to plants and animals in the environment?

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

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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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Using molecular orbital theory, calculate the bond order of the molecule N2+.

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

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How can we accurately detect and quantify the levels of pesticide residues in various types of food samples and determine their potential health impacts on human consumers?

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

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How does the Zeta potential of colloidal particles change with pH and ionic strength? Provide a detailed explanation and relevant examples from research studies.

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

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What are the optimum reaction conditions (e.g. temperature, concentration of catalyst, reaction time, etc.) for the synthesis of polyvinyl alcohol from vinyl acetate monomer, and how do these conditions affect the properties of the resulting polymer?

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

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What is the VSEPR geometry of the molecule CH4?

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

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What is the standard enthalpy change for the reaction 2H₂(g) + O₂(g) -> 2H₂O(l), given the standard enthalpies of formation for H₂O(l), H₂(g) and O₂(g) as -285.8 kJ/mol, 0 kJ/mol and 0 kJ/mol, respectively?

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

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What is the enthalpy change for the reaction when 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of water vapor? (Hint: Use the balanced chemical equation and standard enthalpies of formation for each compound involved.)

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

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How can undergraduate chemistry students be provided with more exposure to current research in the field? What strategies can be implemented by universities and educators to bridge the gap between classroom learning and research advancements?

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

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What is the VSEPR geometry of NH3 (ammonia) molecule?

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

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What strategies can be implemented to reduce nitrogen and phosphorus pollution in agricultural runoff and improve water quality in nearby bodies of water?

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

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What is the enthalpy change for the isomerization of butene-1 to butene-2, given that the standard enthalpy of formation for butene-1 and butene-2 are -123 kJ/mol and -131 kJ/mol respectively?

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

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