Recent activity by JulietaNesbi

1 answer 32 views

How does the composition of phospholipids in cell membranes affect the membrane's structure and function?

answered 4 days ago in BioChemistry

1 answer 35 views

How can metal-organic frameworks (MOFs) be utilized for the storage and delivery of drugs, and what factors influence the drug release behavior from MOFs?

answered Feb 6 in Coordination Chemistry

1 answer 56 views

Here's an example problem for the student to solve:When 0.10 moles of a weak acid HA are dissolved in 1.00 L of water, the pH of the resulting solution is measured to be 4.20. Calculate the equilibrium constant (Ka) for the dissociation of HA if the acid is known to be 10% ionized.

asked Feb 4 in Chemical equilibrium

1 answer 43 views

Calculate the standard enthalpy change for the phase transition of ice to water at 298 K, given that the heat of fusion of ice is 6.01 kJ/mol and the molar heat capacity of ice and water are 37.0 J/(mol*K) and 75.3 J/(mol*K), respectively.

asked Feb 3 in Chemical thermodynamics

1 answer 95 views

Design a heat exchanger to cool down a mixture of water and ethylene glycol from 80°C to 20°C using cooling water from a nearby lake that enters at 15°C. The mixture flow rate is 10 L/min, and the desired outlet temperature is 20°C. The heat transfer coefficient for the heat exchanger is 250 W/(m².K) and the overall heat transfer coefficient is to be assumed as 350 W/(m².K). The heat capacity of the mixture is 3.8 kJ/(kg.K) and the density is 1030 kg/m³. Determine: a) the surface area of the heat exchanger required for this process,b) the volume flow rate of cooling water required, and c) the overall heat transfer rate in kW.

answered Jan 30 in Chemical engineering

1 answer 57 views

Calculate the heat capacity of a 25.0 g sample of copper, given that it was heated from 25°C to 50°C when it absorbed 209 J of heat. The specific heat capacity of copper is 0.385 J/g°C.

asked Jan 23 in Chemical thermodynamics

1 answer 47 views

According to Erikson's psychosocial theory, what is the final stage of development?

asked Jan 20 in Psychology

1 answer 11 views

When might bystander apathy occur?

answered Jan 17 in Psychology

1 answer 9 views

What is the role of dreams in psychotherapy?

answered Jan 15 in Psychology

1 answer 11 views

What are sexual selection and mate choice?

answered Jan 15 in Psychology

1 answer 21 views

What is grief support?

asked Jan 14 in Psychology

1 answer 44 views

The tails of the hale-bopp comet point away from the sun, evidence that light has what property of motion?

answered Jan 2 in Science

1 answer 77 views

Instead of wood, what do some fireplaces use?

asked Dec 31, 2024 in Science

...