Recent activity by ElaneLavarac

1 answer 42 views

Calculate the enthalpy change for the reduction of iron (III) oxide using carbon in a thermite reaction if 12.5 grams of iron (III) oxide reacts with excess carbon, and the resulting iron has a mass of 7.5 grams. Assume all heat evolved is absorbed by the iron and that the reaction occurs at constant pressure.

asked Jan 23 in ThermoChemistry

1 answer 36 views

Calculate the enthalpy change for the following reaction using Hess's Law calculations:2H2S(g) + 3O2(g) → 2H2O(l) + 2SO2(g)Given the following information:2H2(g) + O2(g) → 2H2O(l) ΔH1 = -484 kJ/mol2S(s) + 3O2(g) → 2SO3(g) ΔH2 = -791 kJ/mol2H2(g) + S(s) → 2H2S(g) ΔH3 = -36 kJ/mol

asked Jan 23 in ThermoChemistry

1 answer 44 views

Calculate the corrosion potential of copper in seawater environment having a pH of 8.2 and a temperature of 25°C given that the standard hydrogen electrode potential is -0.76 V and the concentration of copper ions in seawater is 2.5 x 10^-5 M.

asked Jan 23 in ElectroChemistry

1 answer 66 views

A chemistry student needs to identify an unknown compound found at a crime scene using mass spectrometry. The compound has a molecular weight of 286 g/mol and the mass spectrum shows a strong peak at m/z = 180 and a weaker peak at m/z = 148. What is the possible molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry

1 answer 55 views

What was the aim of the Stanford prison experiment?

answered Jan 20 in Psychology

1 answer 22 views

What is the positive psychology approach in psychology?

asked Jan 20 in Psychology

1 answer 24 views

What are the strengths of the Frequency Theory?

asked Jan 16 in Psychology

1 answer 57 views

According to the cognitive dissonance theory, what is the role of justification?

asked Jan 16 in Psychology

1 answer 19 views

What is the role of cognitive biases in CBT?

asked Jan 16 in Psychology

1 answer 4 views

What is a focus group in qualitative research?

answered Jan 16 in Psychology

1 answer 38 views

When was the self-categorisation theory proposed?

asked Jan 15 in Psychology

1 answer 20 views

What is the Dartmouth Conference?

asked Jan 15 in Psychology

1 answer 21 views

What is the main difference between the psychodynamic and humanistic approaches?

answered Jan 15 in Psychology

1 answer 21 views

What is neural network in AI?

asked Jan 15 in Psychology

1 answer 27 views

What tells you how much of the food you should eat to get the nutrients listed on the label?

answered Jan 7 in Science

1 answer 26 views

What are the two main types of sedimentary rocks?

answered Jan 6 in Science

1 answer 25 views

The term "environment of deposition" is useful for understanding the characteristics of what type of rock?

answered Jan 2 in Science

1 answer 27 views

Mammals belong to which class of vertebrates?

answered Dec 31, 2024 in Science

1 answer 11 views

Cycloalkanes are hydrocarbons whose molecules are closed rings rather than straight or branched chains. a cyclic hydrocarbon is a hydrocarbon with a ring of these?

answered Dec 30, 2024 in Science

1 answer 23 views

A wall of rocks or concrete that juts out into the ocean perpendicular to the shore is called?

answered Dec 30, 2024 in Science

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