Answers by NealWooldrid

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Determine the heat of hydration, in kJ/mol, for the reaction between solid Calcium chloride (CaCl2) and water (H2O), given that 1 mole of CaCl2 dissolves to produce 3 moles of ions and releases -82.8 kJ of heat in the process.

answered 1 day ago in ThermoChemistry

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Calculate the standard enthalpy of formation of methanol, CH3OH (l), given that the standard enthalpy of combustion of methanol is -726.4 kJ/mol and the standard enthalpy of formation of carbon dioxide and water are -393.5 kJ/mol and -285.8 kJ/mol, respectively.

answered 2 days ago in ThermoChemistry

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How can the lack of representation in the chemistry field be addressed to encourage greater diversity and inclusivity among chemistry professionals?

answered 5 days ago in Chemical education

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How can X-ray fluorescence spectroscopy be used to identify the presence of specific elements in a sample, and what factors affect the accuracy and precision of this analytical technique?

answered 6 days ago in Analytical Chemistry

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Calculate the enthalpy change involved in the precipitation reaction between 50ml of 0.1 M lead nitrate solution and 50ml of 0.1 M sodium chloride solution at a constant temperature of 25°C. The balanced chemical equation for the reaction is Pb(NO3)2 + 2NaCl → PbCl2 + 2NaNO3. Standard enthalpies of formation for Pb(NO3)2, NaCl, PbCl2, and NaNO3 are -460.56 kJ/mol, -407.33 kJ/mol, -359.57 kJ/mol, and -467.93 kJ/mol respectively.

answered Jan 23 in ThermoChemistry

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How does nicotine affect the brain?

answered Jan 20 in Psychology

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How does metapsychology relate to psychoanalysis?

answered Jan 16 in Psychology

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What is the self-concept?

answered Jan 14 in Psychology

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42 views

What do tadpoles change into?

answered Jan 6 in Science

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What supports life, and is also needed for the water cycle and weather?

answered Jan 2 in Science

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