Recent activity by PrestonGarri

1 answer 28 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 that the enthalpy of formation of solid carbon dioxide and gaseous carbon dioxide are -393.5 kJ/mol and -393.5 kJ/mol, respectively.

answered Feb 3 in Chemical thermodynamics

1 answer 78 views

What are the functional groups present in the given unknown compound and how can they be identified using infrared spectroscopy?

asked Jan 30 in Analytical Chemistry

1 answer 53 views

A student needs to calculate the enthalpy change for a chemical reaction given the enthalpies of formation of the reactants and products. The specific problem is: Calculate the enthalpy change for the reaction:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)Given the following enthalpies of formation:ΔHf(CH4) = -74.8 kJ/molΔHf(CO2) = -393.5 kJ/molΔHf(H2O) = -285.8 kJ/mol

answered Jan 22 in Chemical reactions

1 answer 82 views

What is the solubility of barium sulfate in water at a temperature of 25°C? Give the answer in grams of BaSO4 per 100 mL of water.

asked Jan 21 in Inorganic Chemistry

1 answer 58 views

What is the pH of a 0.1 M solution of acetic acid (CH3COOH) and its corresponding acetate ion (CH3COO-) when the dissociation constant (Ka) of acetic acid is 1.8 x 10^-5 at 25°C?

asked Jan 21 in Organic Chemistry

1 answer 43 views

What is Spearman's rank correlation coefficient?

answered Jan 20 in Psychology

1 answer 10 views

What is an example of a positive influence at the microsystem level according to ecological systems theory?

answered Jan 17 in Psychology

1 answer 31 views

When might older adults experience 'ego integrity'?

answered Jan 17 in Psychology

1 answer 54 views

What is the Narrative Therapy approach?

answered Jan 16 in Psychology

1 answer 43 views

What is prevention?

answered Jan 14 in Psychology

1 answer 15 views

What is extinction in behaviourism?

answered Jan 13 in Psychology

1 answer 11 views

What is the significance of the term 'anguish' in Sartre's philosophy?

asked Jan 10 in Psychology

1 answer 34 views

Which cycle is named after the scientist melvin calvin?

answered Jan 8 in Science

1 answer 14 views

What is the body system that digests food mechanically and chemically and absorbs nutrients?

answered Jan 6 in Science

1 answer 36 views

Through which process do behaviors that improve fitness increase?

answered Jan 2 in Science

1 answer 40 views

Osteoclasts and osteoblasts play key roles in repair of what?

asked Dec 31, 2024 in Science

1 answer 11 views

What is a hydrocarbon in which the carbon chain joins to itself in a ring?

asked Dec 28, 2024 in Science

1 answer 29 views

What is the name for the male gamete?

answered Dec 27, 2024 in Science

1 answer 58 views

What is the term for an infection caused by a fungal parasite?

answered Dec 27, 2024 in Science

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