Questions by DanielleSauc

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1 answer 29 views

How does surface modification of biomaterials affect protein adsorption?

asked Feb 17 in Surface Chemistry

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1 answer 4 views

How can we use structure-based drug design approaches to develop more effective chemotherapeutic agents for the treatment of breast cancer?

asked Feb 14 in Medicinal Chemistry

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1 answer 27 views

What is the role of metalloenzymes in cellular processes? Provide at least three examples of metalloenzymes and explain their functions in detail.

asked Feb 13 in Coordination Chemistry

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1 answer 47 views

Here's a precise problem for a chemistry student to solve:Using Hess's Law, calculate the enthalpy change for the reaction where 2 moles of methane (CH4) reacts with 4 moles of oxygen gas (O2) to form 2 moles of carbon dioxide (CO2) and 4 moles of water (H2O), given the following known enthalpy changes:ΔH1 = -890 kJ/mol for the reaction: CH4 + 2O2 → CO2 + 2H2OΔH2 = -394 kJ/mol for the reaction: C + O2 → CO2ΔH3 = -286 kJ/mol for the reaction: H2 + (1/2)O2 → H2O

asked Feb 4 in Chemical reactions

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1 answer 52 views

Determine the acidity or basicity of the following molecules: ammonia (NH3), hydrogen chloride (HCl), water (H2O), and carbon dioxide (CO2). Rank them in order of increasing acidity or increasing basicity and explain your reasoning.

asked Feb 4 in Chemical bonding

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1 answer 30 views

Calculate the standard enthalpy of formation of water (H2O) given the following information: ΔHf° of H2(g) = 0 kJ/molΔHf° of O2(g) = 0 kJ/molΔHf° of H2O2(l) = -188.2 kJ/mol

asked Feb 3 in ThermoChemistry

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1 answer 48 views

Calculate the standard enthalpy change of the reaction NH3(g) + 2O2(g) → NO2(g) + 3H2O(l) at 25°C, given that the standard enthalpies of formation of NH3(g), O2(g), NO2(g) and H2O(l) are -46.11 kJ/mol, 0 kJ/mol, 33.18 kJ/mol and -285.8 kJ/mol, respectively.

asked Feb 3 in Quantum Chemistry

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1 answer 28 views

Calculate the standard enthalpy change for the phase transition of solid copper to liquid copper given the following data: - the melting point of copper is 1,085°C - the molar heat of fusion of copper is 13.1 kJ/mol.

asked Feb 3 in Chemical thermodynamics

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1 answer 13 views

How can capillary electrophoresis be used to determine the composition of a sample containing multiple ions and molecules? What are the factors that need to be considered while selecting the running buffer and other parameters for the analysis? How does the choice of detector affect the accuracy and sensitivity of the analysis? Moreover, how can the obtained information be used to identify and quantify the various species present in the sample?

asked Jan 29 in Analytical Chemistry

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1 answer 64 views

Calculate the enthalpy change for the combustion of methane, given the following balanced chemical equation:CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)The enthalpies of formation for methane, carbon dioxide, and water are -74.8 kJ/mol, -393.5 kJ/mol, and -241.8 kJ/mol respectively.

asked Jan 23 in Chemical thermodynamics

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1 answer 60 views

Calculate the change in entropy and enthalpy for the reaction of iron (III) oxide with carbon monoxide to form iron and carbon dioxide, given the following information:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)ΔH°f (Fe2O3) = -824.2 kJ/molΔH°f (CO) = -110.5 kJ/molΔH°f (Fe) = 0 kJ/molΔH°f (CO2) = -393.5 kJ/molΔS° (Fe2O3) = 87.4 J/K molΔS° (CO) = 197.9 J/K molΔS° (Fe) = 27.3 J/K molΔS° (CO2) = 213.6 J/K mol

asked Jan 23 in Inorganic Chemistry

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1 answer 66 views

Calculate the bond dissociation energy for the H-H bond in a diatomic hydrogen molecule, given that the enthalpy change for the reaction H2(g) → 2 H(g) is 436 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 77 views

Why do some researchers suggest that power imbalances and perceived injustice may contribute to terrorism?

asked Jan 20 in Psychology

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1 answer 33 views

What are the main features of positive psychology?

asked Jan 20 in Psychology

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1 answer 40 views

When might an individual develop PTSD symptoms?

asked Jan 20 in Psychology

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1 answer 72 views

Where does empowerment place emphasis?

asked Jan 20 in Psychology

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1 answer 71 views

How do amphetamines affect the brain?

asked Jan 17 in Psychology

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1 answer 88 views

Who was Aaron Beck and how did he contribute to CBT theory?

asked Jan 17 in Psychology

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1 answer 13 views

Where might a health psychologist look for the cause of chronic illness?

asked Jan 17 in Psychology

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1 answer 24 views

What is a confounding variable, and how can it be controlled for?

asked Jan 16 in Psychology

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