Recent activity by HelenaFlemin

1 answer 38 views

Consider the reaction: Cu^2+ + 4NH3 ⇌ [Cu(NH3)4]^2+ If the initial concentration of Cu^2+ is 0.5 M and the initial concentration of NH3 is 2 M, what is the concentration of [Cu(NH3)4]^2+ at equilibrium if the concentration of NH3 is increased to 5 M? (Assume the volume of the solution remains constant and the temperature is kept constant.)

asked 2 days ago in Chemical equilibrium

1 answer 22 views

Calculate the standard enthalpy change for the dissolution of 10 grams of potassium hydroxide (KOH) in 100 mL of water. Given that the molar enthalpy of dissolution of solid KOH is -57.61 kJ/mol and the density of water is 1 g/mL.

asked 2 days ago in Chemical thermodynamics

1 answer 57 views

How can Raman spectroscopy be used to identify the presence of benzene rings in a given sample?

asked Jan 29 in Analytical Chemistry

1 answer 43 views

What is the relevance of ethics in experimental psychology?

asked Jan 17 in Psychology

1 answer 22 views

According to Sigmund Freud's psychoanalytic theory, why do individuals experience anxiety?

answered Jan 17 in Psychology

1 answer 6 views

What is the difference between statistical and practical significance in theory evaluation?

answered Jan 16 in Psychology

1 answer 16 views

What is the main concept of the stages of change model?

answered Jan 15 in Psychology

1 answer 26 views

What is phenomenology?

asked Jan 14 in Psychology

1 answer 24 views

Which continent is the only one that reptiles don't inhabit?

asked Jan 8 in Science

1 answer 23 views

Which of these is last if ordered in increasing size: galaxy, solar system, star cluster?

asked Jan 8 in Science

1 answer 52 views

What does the body derive from the breakdown of the carbohydrate-containing foods and drinks we consume?

asked Jan 6 in Science

1 answer 43 views

What causes the particles of medium to move parallel to the direction of the wave?

asked Jan 6 in Science

1 answer 22 views

Thomson’s plum pudding model shows the structure of what?

asked Jan 2 in Science

1 answer 26 views

The entire range of light that can be seen by the human eye without aid is known as what kind of light?

answered Jan 2 in Science

1 answer 25 views

The distance of stars is measured in what terms, meaning the light takes many thousands of years to reach us?

answered Dec 31, 2024 in Science

1 answer 19 views

Culprits in the common cold and aids, what infectious agents are far smaller and simpler than bacteria?

asked Dec 30, 2024 in Science

...