Questions by KalaMoriarty

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1 answer 57 views

Calculate the enthalpy of polymerization for the reaction of ethylene (C2H4) to polyethylene (C2H4)n, given that the enthalpy of combustion for ethylene is -1411 kJ/mol and the number of moles of ethylene used in the reaction is 4.5 mol. Assume that the reaction is exothermic and that the enthalpy change is constant over the extent of the reaction.

asked Jan 23 in ThermoChemistry

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1 answer 34 views

Calculate the enthalpy change for the desorption of water vapor from a silica gel desiccant using the following information:Mass of silica gel desiccant = 5.0 gInitial temperature of silica gel desiccant and water vapor = 25.0 °CFinal temperature after desorption of water vapor = 40.0 °CSpecific heat capacity of silica gel = 1.16 J/g°CHeat absorbed by the calorimeter = -222.4 JAssume all heat absorbed by calorimeter comes solely from the desorption of water vapor.

asked Jan 23 in ThermoChemistry

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1 answer 23 views

What is the role of social comparison in dissonance?

asked Jan 16 in Psychology

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1 answer 22 views

What is the difference between proactive and reactive coping?

asked Jan 14 in Psychology

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1 answer 43 views

What are the limitations of the cognitive approach?

asked Jan 13 in Psychology

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1 answer 15 views

Why does the fish odour diminish when you put lemon juice over cooked fish?

asked Jan 8 in Science

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1 answer 44 views

What is the common name of mixtures of hydrocarbons that formed over millions of years from the remains of dead organisms?

asked Jan 6 in Science

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1 answer 33 views

Plants face two types of enemies: herbivores and what else?

asked Dec 31, 2024 in Science

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1 answer 7 views

What carry messages from our sensory organs and others to the central nervous system?

asked Dec 27, 2024 in Science

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1 answer 45 views

Living things that feed on others are generally known as what?

asked Dec 27, 2024 in Science

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