Questions by NikiCoombs07

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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

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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

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1 answer 25 views

What is the purpose of rituals in OCD?

asked Jan 15 in Psychology

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1 answer 39 views

What is grief therapy?

asked Jan 14 in Psychology

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1 answer 20 views

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

asked Jan 8 in Science

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1 answer 19 views

When does diseases like alzheimer's become more common?

asked Jan 8 in Science

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1 answer 40 views

List the three major types of blood vessels.

asked Dec 31, 2024 in Science

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1 answer 9 views

Light bends when it passes in from what to what?

asked Dec 31, 2024 in Science

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1 answer 8 views

"crossing over" occurs during what phase of mitosis?

asked Dec 27, 2024 in Science

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