Recent activity by ElvinDunford

1 answer 26 views

How can crystallography and knowledge of crystal structures be used to determine the purity of a particular substance?

asked 12 hours ago in Physical Chemistry

1 answer 29 views

Calculate the standard enthalpy of formation of C2H6(g) given the following information: C(s) + O2(g) → CO2(g); ΔH° = -393.5 kJ/mol H2(g) + 1/2 O2(g) → H2O(l); ΔH° = -285.8 kJ/mol 2C(s) + 3H2(g) → C2H6(g); ΔH° = ?

asked 2 days ago in ThermoChemistry

1 answer 60 views

How can infrared spectroscopy be used to identify the presence of a particular functional group in a given compound and what specific frequency range should be observed for that functional group in the spectrum?

asked Jan 29 in Analytical Chemistry

1 answer 39 views

Calculate the amount of heat required to melt 50 grams of ice at 0 C, taking the enthalpy of fusion to be 6.01 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 21 views

When evaluating a theory, what is the criterion for fruitfulness?

asked Jan 20 in Psychology

1 answer 25 views

Who is more likely to engage in intergroup contact?

asked Jan 20 in Psychology

1 answer 12 views

According to the parallel distributed processing model, what happens when we receive information?

answered Jan 17 in Psychology

1 answer 20 views

Who developed the technique of exposure therapy?

asked Jan 15 in Psychology

1 answer 62 views

Who might benefit from online cognitive behavioural therapy?

answered Jan 15 in Psychology

1 answer 23 views

Why do we experience the sensation of pain?

asked Jan 15 in Psychology

1 answer 19 views

What is the top-down processing?

asked Jan 15 in Psychology

1 answer 42 views

When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air?

asked Jan 8 in Science

1 answer 56 views

What is the process of producing eggs in the ovary is called?

answered Jan 7 in Science

1 answer 20 views

The force on a charged particle in a magnetic field is always perpendicular to both its velocity vector and the?

answered Jan 2 in Science

1 answer 6 views

The end of a pine tree branch bears the male cones that produce what?

asked Jan 2 in Science

1 answer 23 views

What can reproduce by infecting the cell of a living host?

answered Dec 28, 2024 in Science

1 answer 23 views

What are typically named for their major physical or climatic factors in addition to their predominant vegetation?

answered Dec 27, 2024 in Science

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