Questions by DortheaConsi

0 votes

1 answer 32 views

Determine the activation energy for the electrochemical reaction that occurs between copper and nitric acid (Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O) given that the rate constant k is 2.31 x 10^-6 mol L^-1 s^-1 at 25°C and the rate constant increases to 3.81 x 10^-5 mol L^-1 s^-1 at 45°C.

asked 1 day ago in ElectroChemistry

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1 answer 21 views

Calculate the standard enthalpy change for the precipitation reaction of 50.0 grams of barium chloride and 75.0 grams of potassium sulfate to form solid barium sulfate and aqueous potassium chloride, given that the heat of formation of solid barium sulfate is -1474 kJ/mol and aqueous potassium chloride is -436 kJ/mol.

asked 2 days ago in Chemical thermodynamics

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1 answer 68 views

A student needs to prepare a solution containing 50 g of ethanol (C2H5OH) dissolved in 250 g of water (H2O) at 25°C. Assuming the heat of mixing for ethanol and water is -5.02 kJ/mol, calculate the heat released or absorbed when the two substances are mixed. Express your answer in kJ.

asked Jan 22 in ThermoChemistry

0 votes

0 answers 10 views

What are some practical applications of indigenous psychology?

asked Jan 15 in Psychology

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1 answer 3 views

What is an informed consent?

asked Jan 14 in Psychology

0 votes

1 answer 25 views

What is the importance of language in understanding indigenous psychology?

asked Jan 14 in Psychology

0 votes

1 answer 44 views

Which structure includes sugar-phosphate "backbones", composed of alternating phosphate groups and deoxyribose sugars, and nitrogenous bases?

asked Jan 8 in Science

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1 answer 57 views

What do farmers use greenhouses for?

asked Jan 6 in Science

0 votes

1 answer 17 views

How are the major families of organic compounds characterized?

asked Dec 30, 2024 in Science

0 votes

1 answer 20 views

Atoms of what element ultimately form in a red supergiant?

asked Dec 30, 2024 in Science

0 votes

1 answer 24 views

All living things are capable of what process whereby living things give rise to offspring?

asked Dec 30, 2024 in Science

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