Recent activity by ShaynaHyatt3

1 answer 26 views

How can chemistry teachers or institutions provide adequate and effective hands-on experimentation opportunities for students, despite limited resources and equipment?

asked 6 days ago in Chemical education

1 answer 35 views

Calculate the standard enthalpy change for the reaction between 2.00 moles of liquid ethanol (C2H5OH) and 3.50 moles of gaseous oxygen (O2) to form carbon dioxide (CO2) gas and liquid water (H2O) at 25°C and standard pressure. The balanced chemical equation for the reaction is C2H5OH + 3O2 → 2CO2 + 3H2O. (The molar enthalpies of formation for C2H5OH, CO2, and H2O are -277.6 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively.)

answered Feb 3 in Chemical thermodynamics

1 answer 54 views

What is the concentration of caffeine in a sample of coffee using liquid chromatography?

answered Jan 30 in Analytical Chemistry

1 answer 50 views

Calculate the heat of crystallization, in kilojoules per mole, when 50.0 grams of sodium hydroxide (NaOH) is dissolved in 500.0 grams of water at 25⁰C and then cooled to 5⁰C, assuming that all the heat evolved during the process is transferred to the solution. The heat capacity of water is 4.18 J/gK, and the enthalpy of formation of NaOH is -425 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 68 views

A chemistry student needs to determine the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)At a certain temperature, 0.2 mole of nitrogen gas (N2), 0.3 mole of hydrogen gas (H2), and 0.4 mole of ammonia gas (NH3) were placed in a 1 L container. Using these initial concentrations, what is the equilibrium constant (Kc) for the reaction?

answered Jan 22 in Chemical equilibrium

1 answer 27 views

When was the Stanford prison experiment conducted?

asked Jan 20 in Psychology

1 answer 20 views

How did Hermann Ebbinghaus' research contribute to the study of memory?

asked Jan 17 in Psychology

1 answer 24 views

When should debriefing occur in a research study?

answered Jan 17 in Psychology

1 answer 34 views

What is the triad of OCD?

asked Jan 15 in Psychology

1 answer 21 views

What is the main focus of the Humanistic Theory?

asked Jan 15 in Psychology

1 answer 36 views

Please compare and contrast the social learning and cognitive-behavioural approaches to therapy.

answered Jan 15 in Psychology

1 answer 26 views

What is the main premise of trait theory?

asked Jan 15 in Psychology

1 answer 7 views

What is the difference between instrumental and emotional support?

answered Jan 14 in Psychology

1 answer 34 views

Which gender typically experiences growth spurts first?

asked Jan 8 in Science

1 answer 10 views

What part of a mature plant cell is responsible for storing substances like water, enzymes, and salts?

asked Jan 7 in Science

1 answer 35 views

What is the si unit for electric current?

answered Jan 7 in Science

1 answer 46 views

A geiger counter is used for detecting what?

asked Dec 30, 2024 in Science

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