Recent activity by DonnellLovel

1 answer 74 views

How can X-ray fluorescence spectroscopy be used to identify and quantify the presence of specific elements in a sample?

asked Jan 30 in Analytical Chemistry

1 answer 54 views

A chemistry student needs to determine the standard enthalpy change for the formation of NH3(g) from its constituent elements, using Hess's Law calculations. The student is given the following information:ΔHf°(NH3) = -46 kJ/molΔHf°(N2) = 0 kJ/molΔHf°(H2) = 0 kJ/molΔH298°(N2H4) = 95 kJ/molΔHf°(N2H4) = 50 kJ/mol2NH3(g) + N2H4(l) → 3N2(g) + 4H2(g)What is the value of ΔHf° for NH3, based on the above data?

answered Jan 22 in ThermoChemistry

1 answer 57 views

According to the diathesis-stress model, what role does family history play in mental illness?

answered Jan 17 in Psychology

1 answer 29 views

What is theory evaluation in health psychology?

asked Jan 16 in Psychology

1 answer 37 views

What is the difference between parametric and non-parametric statistics?

asked Jan 16 in Psychology

1 answer 51 views

What is the main premise of attachment theory?

answered Jan 16 in Psychology

1 answer 53 views

According to the cognitive-behavioural model, what is the role of behavioural experiments in treating anxiety disorders?

asked Jan 15 in Psychology

1 answer 48 views

According to the ecological psychology theory, how do we perceive our environment?

answered Jan 15 in Psychology

1 answer 43 views

What is the therapeutic alliance, and why is it important in psychoanalysis?

answered Jan 13 in Psychology

1 answer 66 views

What substances, which are distinct from acids and bases, form when ions form ionic bonds?

asked Jan 7 in Science

1 answer 34 views

What is the common term for single-celled fungi?

asked Jan 6 in Science

1 answer 46 views

The rise in greenhouse gases has what effect on the temperature of earth?

answered Jan 2 in Science

1 answer 27 views

Oysters require a certain minimum population density because they must be in close proximity to do this?

answered Dec 31, 2024 in Science

1 answer 33 views

In what country can some of the largest natural crystals be found?

answered Dec 31, 2024 in Science

1 answer 40 views

Does warm air sit above or below cooler air in the troposphere?

asked Dec 30, 2024 in Science

1 answer 58 views

Air is said to reach what point, a term used by meteorologists, when humidity increases or temperature decreases?

asked Dec 30, 2024 in Science

1 answer 33 views

What is the smallest portion of a crystal lattice?

answered Dec 28, 2024 in Science

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