Recent activity by Raphael64O24

1 answer 32 views

Determine the standard enthalpy change for the formation of methane gas (CH4) from its constituent elements (C and H2) given the following standard enthalpy of formation values: ΔHf°(C) = 0 kJ/mol and ΔHf°(H2) = 0 kJ/mol.

answered 1 day ago in Chemical thermodynamics

1 answer 21 views

Describe the steps involved in the preparation of 2,4-dichlorobenzoic acid from benzoic acid and chlorine gas, including the chemical reactions that occur during the process, the reagents required, the conditions required for each step, and the yields of each intermediate and final product.

asked 2 days ago in Chemical synthesis

1 answer 43 views

Using an ion-selective electrode, a student measures the concentration of chloride ions in a solution as 0.20 M. The solution also contains either nitrate or sulfate ions. How can the student determine which ion(s) is present in the solution and calculate their concentration?

asked 6 days ago in Analytical Chemistry

1 answer 47 views

Calculate the heat of crystallization when 10.0 g of sodium acetate trihydrate (NaCH3COO.3H2O) is dissolved in 100.0 mL of water at 25°C and the solution is allowed to cool to 15°C. The specific heat capacity of the solution is 4.18 J/g °C and the density of the solution is 1.0 g/mL. The heat of solution of sodium acetate trihydrate is -7126 J/mol.

asked Jan 23 in ThermoChemistry

1 answer 39 views

Calculate the corrosion rate of an iron rod with a surface area of 20 cm² that is connected to a copper plate with a surface area of 25 cm², immersed in a solution of 0.5 M copper sulfate, given that the measured current is 0.2 A.

answered Jan 23 in ElectroChemistry

1 answer 45 views

According to the hierarchy of needs theory, what is the highest level of need?

asked Jan 20 in Psychology

1 answer 15 views

Please compare and contrast the ethics of laboratory and field studies.

answered Jan 20 in Psychology

1 answer 44 views

What is the difference between a psychological construct and a discursive construct?

answered Jan 17 in Psychology

1 answer 5 views

What are the limitations of the inductive approach?

answered Jan 16 in Psychology

1 answer 57 views

What is activity theory and how does it differ from disengagement theory?

answered Jan 16 in Psychology

1 answer 20 views

What is the difference between a 'discursive practice' and a 'discursive strategy'?

asked Jan 16 in Psychology

1 answer 21 views

What are some techniques used in cognitive-behavioural therapy?

answered Jan 15 in Psychology

1 answer 15 views

What is scaffolding?

asked Jan 14 in Psychology

1 answer 31 views

How does personality influence well-being?

answered Jan 14 in Psychology

1 answer 21 views

What is the main difference between correlation and causation?

asked Jan 13 in Psychology

1 answer 39 views

Who proposed that everything in the universe exerts a force of attraction on everything else?

asked Jan 8 in Science

1 answer 17 views

Which disease causes cells to divide out of control

answered Jan 8 in Science

1 answer 45 views

Which pathway carries somatosensory information from the face, head, mouth, and nasal cavity?

answered Jan 8 in Science

1 answer 35 views

What type of systemic response involves lymphocytes?

asked Jan 8 in Science

1 answer 15 views

What controls the opening to the airway and gut?

answered Jan 6 in Science

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