Recent activity by WilmaHcd4413

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Calculate the standard enthalpy change for the reaction of the combustion of liquid ethylene glycol $(C_2H_6O_2)$ when 500g of the compound is burned completely with excess oxygen gas, given the enthalpies of formation of $CO_2$ (-393.5 kJ/mol), $H_2O$ (-285.8 kJ/mol), and $C_2H_6O_2$ (-694.3 kJ/mol).

asked 2 days ago in Chemical thermodynamics

1 answer 67 views

What is the composition of a commercial sample of aspirin, and what are the concentrations of its impurities, if any, determined by liquid chromatography analysis?

asked 6 days ago in Analytical Chemistry

1 answer 66 views

A chemical engineering company has a mixture of ethanol and water with a concentration of 30% ethanol to separate using a distillation column. The company needs to obtain a concentration of 80% ethanol in the distillate at a reflux ratio of 3. Calculate the number of theoretical plates required in the column for the separation, assuming no vapor or liquid bypass, and that the minimum vapor velocity is maintained.

answered Jan 22 in Chemical engineering

1 answer 27 views

Where does the debate between nature and nurture theories take place?

asked Jan 20 in Psychology

1 answer 6 views

Why is it important to have boundaries in friendships?

asked Jan 17 in Psychology

1 answer 6 views

What is the role of cognitive psychology in AI design?

asked Jan 17 in Psychology

1 answer 54 views

How did Susan Blackmore's research with OBEs inform our understanding of consciousness?

asked Jan 17 in Psychology

1 answer 44 views

At what stage does Erikson suggest the child identifies themselves in relation to others?

answered Jan 14 in Psychology

1 answer 5 views

Which cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems?

answered Jan 8 in Science

1 answer 29 views

What phenomenon is crowding out other species and making all the other causes of extinction worse?

asked Jan 7 in Science

1 answer 29 views

What part of the body does the mycobacterium tuberculosis bacterium usually attack?

asked Jan 7 in Science

1 answer 15 views

What is said to occur when both traits appear in a heterozygous offspring?

answered Jan 6 in Science

1 answer 32 views

Metallic bonds allow metals to do what, in the manner of a willow tree?

answered Dec 31, 2024 in Science

1 answer 39 views

A basic function of cells includes obtaining what from glucose?

asked Dec 30, 2024 in Science

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