Recent activity by ErnestoSprou

1 answer 25 views

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.

asked 1 day ago in ThermoChemistry

1 answer 34 views

Calculate the resistance of an electrochemical cell with a cell potential of 1.5 V and current flow of 0.25 A when the concentration of copper(II) ions in the cathode compartment is 0.25 M and the concentration of zinc ions in the anode compartment is 0.50 M. The cell has two electrodes made of platinum and the temperature is 25°C. (Assume the transfer of electrons and ions is 100% efficient.)

answered 2 days ago in ElectroChemistry

1 answer 5 views

How can the concentration of lead in a water sample be determined using atomic absorption spectroscopy? What factors need to be considered and what steps must be taken to obtain accurate and precise results?

answered Jan 29 in Analytical Chemistry

1 answer 71 views

A chemistry student needs to find the percent composition of a compound with the empirical formula CCl. The compound has a molar mass of 98.96 g/mol. What is the percent composition of this compound?

answered Jan 22 in Inorganic Chemistry

1 answer 19 views

How does the cognitive approach evaluate animal psychology?

asked Jan 16 in Psychology

1 answer 20 views

What is a scatterplot?

answered Jan 16 in Psychology

1 answer 34 views

Who is the psychologist who proposed the theory of cognitive dissonance?

asked Jan 15 in Psychology

1 answer 24 views

What is the term for the change in temperature with distance?

asked Jan 7 in Science

1 answer 27 views

The cytoplasm of prokaryotic cells has a high concentration of dissolved solutes. therefore, the osmotic pressure within the cell is what?

answered Dec 31, 2024 in Science

1 answer 45 views

Oxidation does not necessarily require heating. which is the common and natural method of oxidation?

asked Dec 31, 2024 in Science

1 answer 25 views

Magnetite crystals in lava typically point to what geographic location?

answered Dec 31, 2024 in Science

1 answer 42 views

Bones are far from static, or unchanging. instead, they are what?

asked Dec 30, 2024 in Science

1 answer 49 views

A type of what organism causes ergot, a disease that impacts crops directly and has more devastating effects on animals?

asked Dec 30, 2024 in Science

1 answer 21 views

Foresters commonly inoculate pine seedlings with a type of what to promote growth?

answered Dec 27, 2024 in Science

1 answer 29 views

What two types of junctions do animal cells have?

answered Dec 27, 2024 in Science

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