Recent activity by RafaelaReddy

1 answer 25 views

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

1 answer 83 views

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

1 answer 66 views

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

1 answer 7 views

What is the term used to describe the tendency to give more value to immediate rewards rather than future rewards?

asked Jan 15 in Psychology

1 answer 27 views

What is cognitive accessibility?

asked Jan 13 in Psychology

1 answer 36 views

What is the theory of planned behaviour?

asked Jan 13 in Psychology

1 answer 8 views

What simple sugar is the cell's primary source of energy?

asked Jan 7 in Science

1 answer 52 views

What is less dense then either solids or liquids?

asked Jan 6 in Science

1 answer 24 views

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

1 answer 12 views

What common process is used in the production of bread, cheese and alcoholic beverages?

asked Dec 28, 2024 in Science

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