Recent activity by BrigetteFinc

1 answer 28 views

How can chemistry students increase public awareness about the important role of chemistry in society and the economy?

asked 1 day ago in Chemical education

1 answer 27 views

Calculate the standard enthalpy change for the complete combustion of methane gas (CH4(g)) at constant pressure, given the balanced equation: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l). The standard enthalpies of formation of CO2(g), H2O(l), and CH4(g) are -393.5 kJ/mol, -285.8 kJ/mol, and -74.8 kJ/mol, respectively.

asked 2 days ago in Chemical thermodynamics

1 answer 60 views

How can X-ray diffraction be used to analyze the composition of a sample containing both crystalline and amorphous materials? Provide a detailed explanation and examples of how this analytical technique can determine the types and quantities of components present in the sample.

answered 6 days ago in Analytical Chemistry

1 answer 54 views

Assuming you have the equilibrium constant value for a given chemical equation, determine the concentration of products and reactants at equilibrium for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g); Kc = 6.0 x 10^2 at 500°C. If the initial concentration of N2 is 0.1 M and the initial concentration of H2 is 0.2 M, what is the concentration of NH3 at equilibrium?

answered Jan 22 in Chemical equilibrium

1 answer 26 views

According to the social exchange theory, what is a key determinant of relationships?

asked Jan 20 in Psychology

1 answer 46 views

Why do some researchers suggest that parenting styles, such as authoritarian and permissive parenting, may contribute to conduct disorder?

asked Jan 20 in Psychology

1 answer 25 views

What are the weaknesses of the Place Theory?

answered Jan 16 in Psychology

1 answer 36 views

What are the main components of sleep architecture?

answered Jan 14 in Psychology

1 answer 35 views

What is self-determination theory?

asked Jan 14 in Psychology

1 answer 23 views

What is the measure of an individual’s weight-to-height ratio called?

asked Jan 7 in Science

1 answer 55 views

As temperature increases, the solubility of the majority of solid substances does what?

answered Dec 30, 2024 in Science

1 answer 18 views

A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into these?

answered Dec 30, 2024 in Science

1 answer 31 views

What system, which includes the skin, plays important roles in protection, sensing stimuli and thermoregulation?

asked Dec 27, 2024 in Science

...