Answers by MavisRevell

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What is the optimal temperature and pressure condition for the synthesis of polyethylene oxide from ethylene oxide monomer, and how does varying these conditions affect the product's molecular weight and properties?

answered 3 days ago in Chemical synthesis

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What are the key steps involved in the development of a chemical process for the production of polymers? How do these steps vary depending on the type of polymer being produced and the desired properties of the final product?

answered 6 days ago in Chemical engineering

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How does eutrophication affect the dissolved oxygen levels in aquatic ecosystems and what are the potential consequences for the ecosystem and its inhabitants?

answered Feb 13 in Environmental Chemistry

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How can we design luminescent materials with high quantum yield and tunable emission properties for various applications?

answered Feb 12 in PhotoChemistry

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How can the polymerization reaction of styrene monomer be controlled to achieve a desired degree of polymerization and molecular weight for the synthesis of polystyrene with specific physical and chemical properties?

answered Feb 10 in Chemical synthesis

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How can the impurities in a sample of ethyl acetate be separated and removed to obtain a pure sample, and what is the most efficient and cost-effective technique that can be used for this?

answered Feb 7 in Chemical engineering

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How can novel small molecule inhibitors be designed and synthesized to target specific molecular pathways involved in the development of respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD)?

answered Feb 5 in Medicinal Chemistry

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How can inadequate emphasis on chemical reactions and equations affect a student's understanding of chemistry concepts, and what steps can be taken to improve this emphasis in the classroom?

answered Feb 5 in Chemical education

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Calculate the standard enthalpy change for the reaction of [Co(H2O)6]2+(aq) with 2 Cl-(aq) to form [CoCl4]2-(aq) and 6 H2O(l) at a temperature of 298 K. Given the following thermodynamic data:[Co(H2O)6]2+(aq) + 4 Cl-(aq) → [CoCl4]2-(aq) + 6 H2O(l) ΔH°= -98.7 kJ mol-1[Co(H2O)6]2+(aq) + 2 Cl-(aq) → [CoCl4]2-(aq) + 4 H2O(l) ΔH°= -65.5 kJ mol-1Assume that the enthalpy of hydration for Cl- (aq) is -364 kJ mol-1.

answered Feb 3 in Chemical thermodynamics

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A chemistry student wants to determine the percentage of ethanol in a sample of wine. The student takes a 50 mL aliquot of the wine, dries it, and finds the weight of the residual solids to be 0.325 g. The student then distills the rest of the wine, evaporates the distillate to dryness, and finds the weight of the residue to be 2.324 g. Using mass balance calculations, what is the percentage of ethanol in the wine sample?

answered Jan 22 in Analytical Chemistry

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54 views

According to the social cognitive theory, what is the role of reinforcement in anxiety?

answered Jan 17 in Psychology

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37 views

What is the critique of cultural competence?

answered Jan 16 in Psychology

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42 views

According to Sigmund Freud, what is the role of the ego?

answered Jan 16 in Psychology

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Where is pragmatism particularly useful?

answered Jan 16 in Psychology

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Who developed the concept of the dramaturgical perspective?

answered Jan 15 in Psychology

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What is anxious-ambivalent attachment?

answered Jan 14 in Psychology

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What is the continuing bond theory of grief?

answered Jan 14 in Psychology

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44 views

What is a control group?

answered Jan 13 in Psychology

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37 views

What is the role of choice in existential psychology?

answered Jan 13 in Psychology

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35 views

What is the difference between correlation and causation?

answered Jan 10 in Psychology

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