Recent activity by ChristaJerse

1 answer 48 views

Calculate the lattice energy of MgO using the Born-Haber cycle given the following information: the standard enthalpies of formation of MgO(s), Mg(g), and O2(g) are -601.6 kJ/mol, 147.3 kJ/mol and 0 kJ/mol respectively, the ionisation energy of Mg(g) is 737.7 kJ/mol, the electron affinity of O2(g) is -141 kJ/mol, and the bond energy of the O2 molecule is 498 kJ/mol.

asked Jan 23 in Inorganic Chemistry

1 answer 5 views

A steel pipe is in contact with a copper pipe in a galvanic couple, with the steel pipe acting as the anode. The corrosion current density of the steel pipe in the couple is 0.008 mA/cm². Determine the rate of corrosion of the steel pipe, assuming that the density of steel is 7.8 g/cm³ and the thickness of the pipe is 2.5 mm. Also, calculate the time taken for the pipe to corrode completely, assuming an initial mass of 5 kg.

asked Jan 22 in ElectroChemistry

1 answer 28 views

How does observational learning work?

asked Jan 20 in Psychology

1 answer 5 views

What is the impact of social support on mental health?

asked Jan 14 in Psychology

1 answer 19 views

What type of seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production?

asked Jan 8 in Science

1 answer 28 views

What is the process called in which a magnet loses its magnetic properties?

answered Jan 7 in Science

1 answer 26 views

What is the measure of the amount of space occupied by an object?

asked Jan 7 in Science

1 answer 22 views

What are the two best known baryons?

asked Jan 6 in Science

1 answer 26 views

In which direction does heat always flow through objects?

asked Dec 31, 2024 in Science

1 answer 18 views

Any organism that causes disease is called what?

answered Dec 30, 2024 in Science

1 answer 27 views

Along with dna, what is the other main type of nucleic acid?

answered Dec 30, 2024 in Science

1 answer 17 views

How long does it take for the earth to make a complete rotation of its axis?

answered Dec 27, 2024 in Science

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