Questions by Sylvia941924

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1 answer 27 views

What is the most efficient method for the preparation of 2,4-dichloronitrobenzene from nitrobenzene and chlorine gas, and what are the optimal reaction conditions (temperature, pressure, solvent, etc.) for this synthesis process?

asked Feb 21 in Chemical synthesis

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1 answer 31 views

What is the most effective way to determine the rate of an inorganic chemical reaction involving two or more reactants, when one or more of the reactants is in excess?

asked Feb 21 in Inorganic Chemistry

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1 answer 42 views

What is the optimum conditions (concentration, temperature, and reaction time) for the preparation of phenylalanine from benzyl chloride and ammonia using the Gabriel synthesis method?

asked Feb 20 in Chemical synthesis

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1 answer 30 views

How does the concentration of reactants and products affect the rate of a chemical reaction at equilibrium, and how can this effect be quantitatively measured?

asked Feb 19 in Chemical kinetics

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1 answer 29 views

What is the balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH), and how many moles of sodium chloride (NaCl) will be produced when 50 mL of 0.1 M HCl is reacted with excess NaOH?

asked Feb 17 in Chemical reactions

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1 answer 27 views

In which type of environment(s) will the adsorption of pollutants on activated carbon be more effective, acidic or basic? Write an experimental design to test this question.

asked Feb 17 in Surface Chemistry

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1 answer 77 views

How do the photochemical properties of enantiomers differ from each other and how can this knowledge be utilized in various fields of chemistry, such as drug development and asymmetric synthesis?

asked Feb 13 in PhotoChemistry

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1 answer 62 views

What is the structural difference between cis- and trans-isomers of butenedioic acid? Explain how this difference affects the physical and chemical properties of these isomers.

asked Feb 12 in Organic Chemistry

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1 answer 40 views

How can schools and chemistry educators effectively engage students and foster a love for chemistry, despite the prevalent lack of interest in the subject among students?

asked Feb 5 in Chemical education

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1 answer 41 views

Calculate the standard enthalpy change for the fusion reaction of a sodium atom. Given the enthalpy of formation of Na(g) is 107.3 kJ/mol and the enthalpy of fusion of Na(s) is 2.6 kJ/mol.

asked Feb 3 in Chemical thermodynamics

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1 answer 71 views

Calculate the standard electrode potential for the following cell: Mg (s) | Mg2+ (aq, 0.10 M) || Ag+ (aq, 1.0 M) | Ag (s) Given: E°(Ag+/Ag) = +0.80 V E°(Mg2+/Mg) = -2.37 V

asked Feb 3 in ElectroChemistry

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1 answer 83 views

What is the effect of a catalyst on the rate of a chemical reaction, and how does this relate to the reaction mechanism?

asked Jan 30 in Chemical kinetics

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1 answer 93 views

What steps can be taken to address the issue of inadequate emphasis on chemical reactions and equations in the chemistry curriculum, and what impact would these steps have on student learning outcomes and retention rates?

asked Jan 30 in Chemical education

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1 answer 83 views

A 1.00 gram sample of sucrose (C12H22O11) is completely hydrolyzed in solution with excess HCl. If the solution is cooled to room temperature, what is the change in enthalpy ($\Delta H$) for the reaction? The heat capacity of the solution is 4.18 J/(g*K) and the temperature change is -10°C.

asked Jan 22 in ThermoChemistry

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1 answer 84 views

What are the implications of the biosocial developmental model for personality disorders?

asked Jan 20 in Psychology

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1 answer 97 views

What is the concept of stereotyping?

asked Jan 20 in Psychology

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1 answer 32 views

Why is the dopamine hypothesis significant?

asked Jan 20 in Psychology

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1 answer 44 views

What is the impact of stress on mental rotation?

asked Jan 17 in Psychology

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1 answer 51 views

What factors can influence the success of the contact hypothesis?

asked Jan 17 in Psychology

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1 answer 44 views

According to the cognitive theory, what is anxiety?

asked Jan 17 in Psychology

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