Recent activity by CandraDawbin

1 answer 32 views

Determine the oxidation state of sulfur in sodium sulfite (Na2SO3) using the oxidation state rules and justify your answer with proper explanation.

answered 1 day ago in ElectroChemistry

1 answer 19 views

Calculate the standard heat of formation (in kJ/mol) of water (H2O) given the following bond energies: H-H = 436 kJ/mol, O=O = 498 kJ/mol, H-O = 463 kJ/mol.

asked 1 day ago in Chemical bonding

1 answer 19 views

Calculate the standard enthalpy change for the reaction: 2 Al(s) + 3/2 O2(g) → Al2O3(s) given the following information: ΔH°f[Al2O3(s)] = -1676.0 kJ/mol ΔH°f[Al(s)] = 0 kJ/mol ΔH°f[O2(g)] = 0 kJ/mol

answered 1 day ago in Chemical thermodynamics

1 answer 23 views

Calculate the standard enthalpy change (∆H°) for the precipitation reaction between aqueous solutions of silver nitrate (AgNO3) and sodium chloride (NaCl) to form solid silver chloride (AgCl), given that 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M NaCl were combined in a calorimeter and the temperature change was recorded as -2.5°C.

answered 2 days ago in Chemical thermodynamics

1 answer 39 views

How can electrophoresis be used to analyze the composition of protein samples in the laboratory setting? Specifically, what factors affect the separation of proteins during electrophoresis and how can these factors be manipulated to optimize separation and analysis?

answered Jan 29 in Analytical Chemistry

1 answer 35 views

Calculate the enthalpy of polymerization of styrene given that the enthalpy change for the addition of one mole of styrene is -32 kJ/mol and the polymerization involves the addition of 50 monomer units. Assume that all the enthalpy change is due to polymerization and the reaction is exothermic.

asked Jan 23 in ThermoChemistry

1 answer 48 views

A student wants to electroplate a piece of copper with silver in an electrochemical cell. If a current of 0.5 A is passed through the cell for 30 minutes, what mass of silver will be deposited on the copper piece? The atomic mass of silver is 107.87 g/mol and the faraday constant is 96,485 C/mol.

asked Jan 22 in ElectroChemistry

1 answer 16 views

What brain region is associated with relapse during addiction recovery?

asked Jan 20 in Psychology

1 answer 4 views

Why is random assignment important in experimental design?

asked Jan 20 in Psychology

1 answer 14 views

How did Pavlov's dog experiment demonstrate classical conditioning?

asked Jan 20 in Psychology

1 answer 48 views

What is the Person-Centred Therapy PCT approach?

answered Jan 16 in Psychology

1 answer 8 views

According to Bowlby, what is the significance of secure attachment in early childhood?

answered Jan 15 in Psychology

1 answer 14 views

According to Rogers, what is the role of the therapist in humanistic therapy?

answered Jan 15 in Psychology

1 answer 21 views

How is the triarchic theory of intelligence applied in practice?

asked Jan 15 in Psychology

1 answer 20 views

What is the role of values in cross-cultural psychology?

asked Jan 14 in Psychology

1 answer 13 views

What is James-Lange theory of Emotion?

asked Jan 13 in Psychology

1 answer 21 views

What do willow trees produce to kill bacteria?

answered Jan 6 in Science

1 answer 8 views

What are the the individual protein subunits making up the capsid called?

asked Dec 27, 2024 in Science

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