Recent activity by VivianDeucha

1 answer 48 views

What is the concentration of caffeine in a sample of coffee using liquid chromatography?

asked 6 days ago in Analytical Chemistry

1 answer 44 views

Calculate the lattice energy of magnesium oxide (MgO) given that the magnesium ion has a charge of +2 and the oxide ion has a charge of -2. The lattice energy can be calculated using the Born-Haber cycle and the following data:- The enthalpy of sublimation of magnesium (Mg) is 147 kJ/mol- The first ionization energy of magnesium is 738 kJ/mol- The enthalpy of formation of MgO is -601 kJ/mol- The electron affinity of oxygen is -141 kJ/mol- The enthalpy of dissociation of oxygen molecules is 498 kJ/mol.

answered Jan 23 in Inorganic Chemistry

1 answer 47 views

A student wishes to determine the standard reduction potential of an unknown metal electrode in a half-cell. They set up an electrochemical cell using a known standard hydrogen electrode (SHE) as the reference electrode and the unknown metal electrode as the working electrode. A voltmeter is used to measure the potential difference between the two electrodes. The reading is +0.45 V. What is the standard reduction potential of the unknown metal electrode in volts?

answered Jan 22 in Physical Chemistry

1 answer 25 views

What is the cause of borderline personality disorder?

asked Jan 20 in Psychology

1 answer 4 views

Please evaluate the cognitive dissonance theory.

answered Jan 17 in Psychology

1 answer 57 views

How does the social categorisation theory explain group stereotypes?

asked Jan 15 in Psychology

1 answer 41 views

What is chronic pain?

asked Jan 15 in Psychology

1 answer 47 views

What are some effective interventions for promoting healthy adolescent development?

answered Jan 14 in Psychology

1 answer 6 views

What is the significance of spirituality and religion in understanding grief?

answered Jan 14 in Psychology

1 answer 56 views

Who developed the theory of cognitive dissonance?

answered Jan 10 in Psychology

1 answer 24 views

What method is used to map the earth on flat paper?

answered Jan 7 in Science

1 answer 18 views

What kind of reaction, in general, keeps stars shining?

asked Jan 7 in Science

1 answer 8 views

What is the term for a combination of substances in which there is no chemical reaction?

answered Jan 7 in Science

1 answer 21 views

What is the largest planet in the solar system?

answered Jan 7 in Science

1 answer 26 views

Through which organ do hookworm larvae enter the human body?

answered Jan 2 in Science

1 answer 13 views

Aside from light, incandescent light bulbs also give off what that wastes energy?

answered Dec 30, 2024 in Science

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