Recent activity by NikiCoombs07

1 answer 19 views

Here's a precise problem for the student to solve:What is the oxidation state of carbon in ethanol (C2H5OH)? Show the electron transfer steps involved in the oxidation of ethanol to acetic acid (CH3COOH) using balanced half-reactions.

answered 1 day ago in Organic Chemistry

1 answer 28 views

Calculate the standard enthalpy change for the formation of ammonium chloride (NH4Cl) from its constituent elements, nitrogen (N2), hydrogen (H2), and chlorine (Cl2), given the following information:Reaction equation: N2(g) + 4H2(g) + 2Cl2(g) → 2NH4Cl(s)Standard enthalpy of formation for NH4Cl: -314.4 kJ/molStandard enthalpy of formation for N2(g): 0 kJ/molStandard enthalpy of formation for H2(g): 0 kJ/molStandard enthalpy of formation for Cl2(g): 0 kJ/mol Express your answer in kilojoules per mole (kJ/mol).

asked 2 days ago in Chemical thermodynamics

1 answer 3 views

What is the calculated bandgap of a silicon crystal using Density Functional Theory (DFT) calculations, with a lattice parameter of 5.43 Å? How does the calculated bandgap compare to experimental values reported in the literature?

answered 5 days ago in Computational Chemistry

1 answer 32 views

How can the presence of specific elements in a sample be identified using X-ray fluorescence spectroscopy and how can the results be used to determine the composition and purity of the sample?

answered Jan 29 in Analytical Chemistry

1 answer 6 views

A chemistry student wants to buffer a solution with a pH of 4.5. The student adds 0.1 mol of a weak acid buffer to 0.1 mol of a conjugate base. Taking the pKa value of the buffer into consideration, determine how much stronger an acid in the same buffer system would need to be added to the solution to shift the pH from 4.5 to 4.0, assuming temperature and pressure are constant.

asked Jan 22 in Chemical equilibrium

1 answer 21 views

What are the limitations of Gestalt psychology?

answered Jan 16 in Psychology

1 answer 19 views

What is modern racism?

answered Jan 15 in Psychology

1 answer 5 views

Who proposed the cognitive schema theory?

answered Jan 15 in Psychology

1 answer 25 views

What is the purpose of rituals in OCD?

asked Jan 15 in Psychology

1 answer 39 views

What is grief therapy?

asked Jan 14 in Psychology

1 answer 20 views

Which organ of our body is harmed if you get meningitis?

asked Jan 8 in Science

1 answer 27 views

Which kingdom are mosses and trees included in?

answered Jan 8 in Science

1 answer 19 views

When does diseases like alzheimer's become more common?

asked Jan 8 in Science

1 answer 40 views

List the three major types of blood vessels.

asked Dec 31, 2024 in Science

1 answer 9 views

Light bends when it passes in from what to what?

asked Dec 31, 2024 in Science

1 answer 288 views

Descending fibers from the cerebrum have branches that connect to neurons in the pons. those neurons project into the cerebellum, providing a copy of motor commands sent to this?

answered Dec 30, 2024 in Science

1 answer 21 views

Blood from the body enters what chamber of the heart before it is pumped to the right ventricle and then to the lungs?

answered Dec 30, 2024 in Science

1 answer 21 views

A decline in blood flow to what organs stimulates release of the enzyme renin, in turn stimulating the reabsorption of sodium and water?

answered Dec 30, 2024 in Science

1 answer 8 views

"crossing over" occurs during what phase of mitosis?

asked Dec 27, 2024 in Science

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