Recent activity by ArianneDuhig

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Here's a precise problem for a chemistry student to solve:Using Hess's Law, calculate the enthalpy change for the reaction where 2 moles of methane (CH4) reacts with 4 moles of oxygen gas (O2) to form 2 moles of carbon dioxide (CO2) and 4 moles of water (H2O), given the following known enthalpy changes:ΔH1 = -890 kJ/mol for the reaction: CH4 + 2O2 → CO2 + 2H2OΔH2 = -394 kJ/mol for the reaction: C + O2 → CO2ΔH3 = -286 kJ/mol for the reaction: H2 + (1/2)O2 → H2O

answered 1 day ago in Chemical reactions

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How does changing the molecular weight of a polymer affect its melt viscosity and how can this be quantitatively measured using rheological measurements such as shear rate and shear stress?

answered 2 days ago in Polymer Chemistry

1 answer 64 views

How does changing the pressure of the reactants in a chemical reaction affect the rate of reaction, according to the collision theory?

answered 5 days ago in Chemical kinetics

1 answer 48 views

Calculate the equilibrium constant, Kc, for the reaction below at 25°C if the concentration of CO2 is 1.2 M, the concentration of H2 is 0.8 M and the concentration of CO is 0.6 M.CO2(g) + H2(g) ⇌ CO(g) + H2O(g)

answered Jan 23 in Chemical equilibrium

1 answer 47 views

A student wants to calculate the amount of copper deposited on the cathode during the electrolysis of a copper (II) sulfate solution. If 2.5 A of current is passed through the cell for 10 minutes, what is the mass of copper that is deposited on the cathode? (Assume the atomic weight of copper is 63.55 g/mol and the Faraday constant is 96,485 C/mol).

asked Jan 22 in ElectroChemistry

1 answer 24 views

Where are the visual field defects commonly found in patients with macular degeneration?

answered Jan 20 in Psychology

1 answer 5 views

According to social learning theory, why do individuals develop phobias?

asked Jan 17 in Psychology

1 answer 36 views

What is the biopsychosocial approach to pain?

asked Jan 16 in Psychology

1 answer 30 views

What is the term for the personal fable seen in adolescents?

answered Jan 15 in Psychology

1 answer 22 views

Who was Jean Piaget?

asked Jan 15 in Psychology

1 answer 20 views

What is 'Technological Determinism'?

answered Jan 14 in Psychology

1 answer 7 views

Why are living things considered to be renewable?

answered Jan 8 in Science

1 answer 31 views

What do we call the movement of individuals into a population from other areas?

answered Jan 6 in Science

1 answer 20 views

What bodily system handles taking in oxygen, getting rid of carbon dioxide, aiding in speech production and sensing odors?

answered Jan 6 in Science

1 answer 15 views

What are the different feeding positions in a food chain or web called?

answered Jan 3 in Science

1 answer 20 views

Wave amplitude of a transverse wave is the difference in height between what and the resting position?

answered Jan 2 in Science

1 answer 49 views

The diversity of alleles and genotypes within a population is known as genetic what?

asked Jan 2 in Science

1 answer 55 views

How is thermal energy transferred in every-day, real life situations, such as holding a warm cup?

asked Dec 28, 2024 in Science

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