Questions by HattieSteven

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1 answer 37 views

Here's a precise problem for a chemistry student to solve, based on Thermochemistry and the Enthalpy of Desorption Calculations:Given the following data for the adsorption of hydrogen gas on a metal surface:- Initial pressure of hydrogen gas = 1 atm- Final pressure of hydrogen gas after adsorption = 0.2 atm- Temperature = 298 K- Surface area of the metal = 5 cm^2- Enthalpy of Desorption of hydrogen gas on the metal surface = -40 kJ/molCalculate the enthalpy change (in kJ) for the adsorption of hydrogen gas on the metal surface.

asked 1 day ago in ThermoChemistry

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1 answer 31 views

Calculate the standard enthalpy change for the fusion of 100 grams of ice at 0°C to liquid water at 0°C. The specific heat capacity of water is 4.184 J/g°C, the standard enthalpy of fusion of water is 6.01 kJ/mol, and the molar mass of water is 18.015 g/mol. Assume all heat absorbed is used to melt the ice and the temperature remains constant.

asked 2 days ago in Chemical thermodynamics

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1 answer 53 views

Calculate the bond dissociation energy (in kJ/mol) of the H-Cl bond in hydrogen chloride molecule, given that the bond length is 127 pm and the vibrational frequency is 8.8 x 10^13 Hz.

asked Jan 23 in Chemical bonding

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1 answer 42 views

Who is associated with the social identity theory?

asked Jan 16 in Psychology

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1 answer 28 views

What is social cognitive theory?

asked Jan 15 in Psychology

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1 answer 33 views

What are the key social changes during adolescence?

asked Jan 14 in Psychology

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1 answer 26 views

What is the name of the zone where water is deeper than 200 meters called?

asked Jan 7 in Science

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1 answer 54 views

What is a silver-colored alkaline earth metal that is even softer than calcium?

asked Jan 6 in Science

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1 answer 22 views

What do you call a species that has died out in the past?

asked Jan 6 in Science

0 votes

1 answer 23 views

In essence, a virus is simply a nucleic acid surrounded by what?

asked Dec 28, 2024 in Science

0 votes

1 answer 21 views

In contrast to mammals and birds, freshwater fishes produce large volumes of very dilute what?

asked Dec 27, 2024 in Science

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