Recent activity by YACCaryn271

1 answer 6 views

Here's a specific problem for the student to solve:Consider the reaction A(g) + B(g) ↔ C(g) with a standard enthalpy change of reaction (ΔH°rxn) of -50 kJ/mol at 298 K. If the initial concentrations of A and B are both 1.0 M, what will be the equilibrium concentration of each gas at 298 K? The equilibrium constant (Kc) for the reaction at 298 K is 2.75 x 10^-2.

answered 1 day ago in Physical Chemistry

1 answer 33 views

Calculate the standard enthalpy change for the complete combustion of 2 moles of methane gas under standard conditions, where all reactants and products are in their standard states. The balanced chemical equation for the combustion of methane is CH4(g) + 2O2(g) → CO2(g) + 2H2O(l), and the standard enthalpy of formation ΔH°f for methane, carbon dioxide, and water are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively.

asked 2 days ago in Chemical thermodynamics

1 answer 63 views

What is the concentration of chloride ions in a sample of seawater? Use potentiometry to quantify the amount of chloride ions present in the sample.

answered 6 days ago in Analytical Chemistry

1 answer 75 views

How can we use polarography to measure the concentration of lead (II) ions in a water sample obtained from a contaminated site?

answered 6 days ago in Analytical Chemistry

1 answer 40 views

A student adds 0.1 M HCl to a solution containing 0.05 M NaOH. Calculate the effect on the equilibrium position of the system after adding a buffer solution consisting of 0.1 M CH3COOH and 0.1 M CH3COONa. Assume the dissociation constant (Ka) of CH3COOH is 1.8x10^-5.

answered Jan 22 in Chemical equilibrium

1 answer 31 views

Who proposed the cognitive-behavioural model of anxiety?

answered Jan 20 in Psychology

1 answer 45 views

Why is understanding sexual identity important in psychology?

answered Jan 20 in Psychology

1 answer 33 views

Who is associated with the concept of cognitive dissonance?

answered Jan 20 in Psychology

1 answer 54 views

What is the assumption of the frustration-aggression theory?

answered Jan 17 in Psychology

1 answer 23 views

Where is acceptance and commitment therapy ACT used in clinical psychology?

asked Jan 16 in Psychology

1 answer 16 views

Why is social support important for wellbeing?

asked Jan 15 in Psychology

1 answer 28 views

What is the role of social support in depression?

asked Jan 14 in Psychology

1 answer 9 views

Who is known for their work on social learning theory?

asked Jan 10 in Psychology

1 answer 56 views

Who built the first telescope?

answered Jan 8 in Science

1 answer 22 views

When a metal is oxidized and a nonmetal is reduced in a redox reaction, what is the resulting compound called?

asked Jan 8 in Science

1 answer 27 views

What kind of muscle is responsible for making the human heart beat?

answered Jan 7 in Science

1 answer 21 views

What is one problem with current methods of aluminum production?

asked Jan 6 in Science

1 answer 27 views

Red blood cells, white blood cells, and platelets are all produced where?

answered Dec 31, 2024 in Science

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