Questions by CathrynMacMa

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1 answer 20 views

What is the major difference between DNA and RNA? Explain the structural features of both biomolecules that account for their different functions in managing genetic information.

asked Feb 20 in Organic Chemistry

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1 answer 34 views

What are the key factors affecting the growth of carbon nanotubes using chemical vapor deposition method, and how can they be optimized to produce longer and more uniform nanotubes with desired properties?

asked Feb 20 in Materials Chemistry

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1 answer 33 views

What is the dipole moment of the hydrogen chloride (HCl) molecule and why is the bond polar?

asked Feb 19 in Chemical bonding

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1 answer 24 views

What is the balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?

asked Feb 17 in Chemical reactions

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1 answer 70 views

What would be the effect of increasing the pH from 2 to 4 on the equilibrium position of the redox reaction between Fe2+ and MnO4- in acidic solution?

asked Feb 13 in Chemical equilibrium

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1 answer 63 views

What is the number of electrons transferred in the following electrochemical reaction: Cu(s) + 2Ag+(aq) -> Cu2+(aq) + 2Ag(s) (Note: the standard reduction potentials of Cu2+(aq)/Cu(s) and Ag+(aq)/Ag(s) are 0.34V and 0.80V, respectively)

asked Feb 13 in ElectroChemistry

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1 answer 44 views

How can the surface properties of a biomaterial be modified to enhance its biocompatibility and reduce the risk of rejection by the human body's immune system?

asked Feb 11 in Surface Chemistry

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1 answer 47 views

How can the formulation of drug delivery systems be optimized to improve the efficacy of a specific drug for a particular medical condition while minimizing potential side effects?

asked Feb 7 in Medicinal Chemistry

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1 answer 89 views

Calculate the standard enthalpy change for the reaction: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g) Given the necessary bond enthalpies are: C-H = 411 kJ/molO=O = 495 kJ/molO-H = 463 kJ/molC=O = 799 kJ/mol.

asked Feb 3 in Quantum Chemistry

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1 answer 65 views

Calculate the standard enthalpy change (∆H°) for the formation of ammonia (NH3) at 298 K using the following data: N2(g) + 3H2(g) → 2NH3(g) ∆H° = −92.4 kJ/mol Hint: Standard enthalpy change (∆H°) for a reaction is calculated by taking the sum of the standard enthalpies of the products minus the sum of the standard enthalpies of the reactants.

asked Feb 3 in Chemical thermodynamics

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1 answer 94 views

What is the concentration of lead ions in a water sample collected from a contaminated site? Use atomic absorption spectroscopy to quantify the lead ions in the sample and report your results in ppm.

asked Jan 31 in Analytical Chemistry

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1 answer 59 views

How can UV-Vis spectroscopy be utilized for identifying the presence of amide functional groups in a given compound?

asked Jan 29 in Analytical Chemistry

+1 vote

1 answer 55 views

How can the purity of a given sample of an unknown substance be determined using only melting point determination?

asked Jan 29 in Analytical Chemistry

0 votes

1 answer 60 views

How can the composition of a protein sample be determined using electrophoresis? Discuss the different types of electrophoresis techniques and their applications in protein analysis. Additionally, provide an example of a real-life application of electrophoresis in protein analysis.

asked Jan 29 in Analytical Chemistry

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1 answer 61 views

According to the social learning theory, how can behaviour modification be achieved?

asked Jan 20 in Psychology

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1 answer 104 views

Where can one find the mirror neurons?

asked Jan 20 in Psychology

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1 answer 44 views

Please list the three types of measures in data collection?

asked Jan 20 in Psychology

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1 answer 38 views

Where did the term 'fight or flight' come from?

asked Jan 20 in Psychology

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1 answer 72 views

How can positive psychology be applied in the workplace?

asked Jan 20 in Psychology

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1 answer 73 views

When do cognitive biases occur?

asked Jan 17 in Psychology

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