Questions by PDLCarmella8

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1 answer 34 views

How can gel permeation chromatography (GPC) be used to determine the molecular weight distribution of a polymer sample? What are the advantages and limitations of using GPC compared to other polymer characterization techniques?

asked Feb 6 in Polymer Chemistry

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1 answer 23 views

Calculate the standard enthalpy change for the vaporization of 25.0 g of water at 100°C, given that the molar enthalpy of vaporization of water is 40.7 kJ/mol. (The molar mass of water is 18.015 g/mol.)

asked Feb 3 in Chemical thermodynamics

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1 answer 45 views

A chemistry student wants to determine the rate constant for the reaction: 2NO(g) + Cl2(g) → 2NOCl(g) They measure the concentrations of all the reactants and products at different times and obtain the following data:Time (s) | [NO] (M) | [Cl2] (M) | [NOCl] (M):--: | :--: | :--: | :--:0 | 0.100 | 0.200 | 0.00010 | 0.080 | 0.180 | 0.04020 | 0.064 | 0.160 | 0.06430 | 0.051 | 0.140 | 0.08140 | 0.041 | 0.120 | 0.089What is the rate constant (k) for this reaction?

asked Jan 22 in Chemical kinetics

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1 answer 41 views

What is an ethnography?

asked Jan 16 in Psychology

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0 answers 6 views

Who proposed the psychological approach to evolutionary theory?

asked Jan 15 in Psychology

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1 answer 15 views

What is the technical term for species that produce their own body heat and regulate their internal temperature independently of the outside temperature?

asked Dec 27, 2024 in Science

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