Recent activity by PatriciaHart

1 answer 15 views

Calculate the standard enthalpy change for the phase transition reaction of solid carbon dioxide (dry ice) at -78.5°C to gaseous carbon dioxide at 1 atm and 25°C, given the following information: The standard enthalpy of fusion of solid carbon dioxide is 8.4 kJ/mol and the standard enthalpy of vaporization of gaseous carbon dioxide is 22.1 kJ/mol.

answered 2 days ago in Chemical thermodynamics

1 answer 51 views

What is the chemical reaction involved in acid mine drainage and how does it affect the pH and mineral content of water bodies?

answered 6 days ago in Environmental Chemistry

1 answer 74 views

What are some effective strategies for understanding complex chemical concepts, and how can they be applied to improve your performance in chemistry class?

answered 6 days ago in Chemical education

1 answer 47 views

How can polarography be used to accurately determine the concentration of a metal ion in a given sample and what are the factors that may affect the accuracy of the analysis?

asked Jan 29 in Analytical Chemistry

1 answer 57 views

Calculate the Gibbs free energy change for the electrochemical reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Given the standard reduction potentials: E°(Cu2+/Cu) = 0.34 V E°(Zn2+/Zn) = -0.76 V Assuming standard conditions of 1 M concentration and 1 atm pressure at 25°C.

answered Jan 23 in ElectroChemistry

1 answer 8 views

According to the change blindness paradigm, how do people miss changes in a visual display?

answered Jan 20 in Psychology

1 answer 5 views

Where might a cognitive psychologist look for the cause of attention deficit hyperactivity disorder ADHD ?

asked Jan 17 in Psychology

1 answer 14 views

What is the strength of Piaget's cognitive development theory?

answered Jan 16 in Psychology

1 answer 45 views

What is the difference between a tic and a compulsion?

asked Jan 16 in Psychology

1 answer 22 views

When do we experience perceptual filling-in?

asked Jan 15 in Psychology

1 answer 21 views

What is cognitive dissonance?

asked Jan 10 in Psychology

1 answer 25 views

What is the wheeled robot developed by nasa to explore the surface of mars?

answered Jan 7 in Science

1 answer 30 views

What is the usual treatment for acute bronchitis?

asked Jan 7 in Science

1 answer 26 views

What is an object that orbits a larger object called?

asked Jan 6 in Science

1 answer 23 views

The fact that all living things share the same biochemical building blocks is molecular evidence of what theorized process?

answered Jan 2 in Science

1 answer 33 views

Tapeworms are what type of flatworms?

asked Dec 31, 2024 in Science

1 answer 26 views

Most air masses form over what two types of regions?

answered Dec 31, 2024 in Science

...