Questions by AHIKayleigh

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1 answer 22 views

What is the rate constant for a first-order reaction that has a half-life of 10 minutes and an initial concentration of 0.1 M?

asked 3 days ago in Chemical kinetics

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1 answer 21 views

What is the optimal temperature and concentration of nitric acid required for the successful preparation of 2,4-dinitrophenol from phenol via nitration? How does changing these parameters affect the yield and purity of the final product?

asked 3 days ago in Chemical synthesis

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1 answer 40 views

What is the electronic structure of methane (CH4) and what are the molecular orbitals involved in its formation, as determined by quantum mechanical calculations?

asked Feb 13 in Quantum Chemistry

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1 answer 6 views

How does the insulin hormone regulate the transport and utilization of fatty acids in the body for energy production? What is the mechanism behind insulin signaling in adipose tissue and liver cells, and how does it influence lipid metabolism?

asked Feb 13 in BioChemistry

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1 answer 43 views

What is the oxidation state of chlorine in HClO4 molecule?

asked Feb 13 in Chemical reactions

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1 answer 43 views

What is the effect of changing the type of ligand on the rate of ligand substitution reactions in coordination chemistry?

asked Feb 13 in Coordination Chemistry

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1 answer 33 views

How can chemistry teachers provide better support for students with learning disabilities in order to help them understand complex chemical concepts and perform well in exams?

asked Feb 5 in Chemical education

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1 answer 61 views

Design a chemical reactor to produce 500 kg of ethylene oxide per hour from ethylene and oxygen gases. Assume the reaction occurs isothermally, and the reactor operates at 3 atm and 250°C. The conversion of ethylene to ethylene oxide is 90%, and the selectivity of ethylene oxide is 97%. You can use either a plug-flow reactor or a continuous stirred-tank reactor. Determine the volume and dimensions of the reactor, and also its cost, assuming a stainless steel construction.

asked Feb 3 in Chemical engineering

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1 answer 69 views

A chemical engineer needs to design a distillation column for the separation of a mixture containing ethanol (boiling point of 78.4°C) and water. The desired composition of the distillate is a minimum of 90% ethanol. What is the minimum number of theoretical trays needed in the column to achieve this composition, given that the feed contains 40% ethanol and the reflux ratio is 1.5?

asked Jan 22 in Chemical engineering

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1 answer 38 views

What is the main criticism of the psychoanalytic approach?

asked Jan 20 in Psychology

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1 answer 64 views

According to Vygotsky's sociocultural theory, what is the role of social interaction in cognitive development?

asked Jan 20 in Psychology

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1 answer 42 views

Please evaluate the Skinner's behaviourism.

asked Jan 20 in Psychology

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1 answer 77 views

Why is it important to respect others' boundaries?

asked Jan 20 in Psychology

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1 answer 66 views

Where might a biological psychologist look for the cause of schizophrenia?

asked Jan 17 in Psychology

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1 answer 60 views

When studying a correlation, what does a coefficient of 0.0 indicate?

asked Jan 17 in Psychology

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1 answer 40 views

What is the criterion of accuracy in theory evaluation?

asked Jan 16 in Psychology

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1 answer 29 views

When does attention affect perception?

asked Jan 16 in Psychology

0 votes

1 answer 13 views

Why is resilience considered as an important factor in positive psychology?

asked Jan 15 in Psychology

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1 answer 60 views

What is the Chinese Room argument?

asked Jan 15 in Psychology

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1 answer 39 views

What is the role of the therapist in humanistic therapy?

asked Jan 15 in Psychology

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