Recent activity by Philip176831

1 answer 4 views

How can the concentration of lead in a sample of water be determined using atomic absorption spectroscopy? What factors should be taken into consideration when preparing the sample and running the analysis? What is the limit of detection for lead using this method, and how does it compare to other methods for detecting heavy metals in water samples?

answered Jan 29 in Analytical Chemistry

1 answer 34 views

Calculate the lattice energy of sodium chloride (NaCl) using Born-Haber cycle and Hess's law. Given the following data:- Enthalpy of sublimation of sodium (Na): +108.6 kJ/mol- Enthalpy of dissociation of chlorine (Cl2): +243.0 kJ/mol- Bond energy of Na-Cl bond: -412.0 kJ/mol- Ionization energy of sodium (Na): +496.0 kJ/mol- Electron affinity of chlorine (Cl): -349.0 kJ/mol- Heat of formation of sodium chloride (NaCl): -411.0 kJ/mol.

answered Jan 23 in Inorganic Chemistry

1 answer 60 views

Calculate the exchange current density of a copper-copper(II) ion electrode at 25 °C, given that the standard potential of the electrode is +0.34 V versus the standard hydrogen electrode and the transfer coefficient of the electrode reaction is 0.5.

asked Jan 23 in ElectroChemistry

1 answer 57 views

What is a sample bias, and how can it impact study findings?

answered Jan 15 in Psychology

1 answer 26 views

What are night terrors?

answered Jan 13 in Psychology

1 answer 31 views

Which type of natural disturbance in temperate grasslands, can be caused by a lightning strike?

asked Jan 8 in Science

1 answer 24 views

When a star's core collapses inward while the outer layers spread and cool, what "colorful" celestial body forms?

asked Jan 8 in Science

1 answer 7 views

What is the leading cause of soil erosion?

answered Jan 7 in Science

1 answer 33 views

What is oceanography the study of?

answered Jan 6 in Science

1 answer 8 views

What is found inside the pores of spongy bone?

asked Jan 6 in Science

1 answer 63 views

What is formed when hot lava cools?

answered Jan 6 in Science

1 answer 44 views

Our digestive system breaks down starch to what?

asked Dec 31, 2024 in Science

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