Answers by RafaelaReddy

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Calculate the standard enthalpy change for the sublimation of iodine, given that the sublimation of 1 mole of iodine requires 62.44 kJ of energy and the standard enthalpy of formation of iodine (s) is 0 kJ/mol.

answered Feb 3 in Chemical thermodynamics

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What is the amount (in moles) of copper ions present in a 500 mL solution of 0.1 M copper sulfate, as determined using coulometry?

answered Jan 30 in Analytical Chemistry

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A chemistry student needs to quantify the amount of iron (II) ions in a sample using colorimetry. The sample was prepared by dissolving a known mass of iron (II) sulfate in water, and the solution was diluted to a known volume. The student needs to determine the concentration of iron (II) ions in the original solution by measuring the absorbance of the sample using a colorimeter, and then using calibration curves to convert the absorbance to concentration. The student also needs to calculate the percentage error of the experiment and suggest ways to improve the accuracy of the results.

answered Jan 22 in Analytical Chemistry

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In what form is the heat absorbed when you heat ice and it reaches a temperature of 0 c?

answered Dec 31, 2024 in Science

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