Recent activity by ValRocha1287

1 answer 23 views

How can one determine the crystal structure of an inorganic solid using X-ray diffraction techniques?

asked 10 hours ago in Inorganic Chemistry

1 answer 28 views

Determine the standard enthalpy of formation of methane (CH4) using Hess's Law, given the following reactions and enthalpy changes: 1. C(graphite) + 2H2(g) -> CH4(g) ΔH1 = -74.6 kJ/mol 2. 2H2(g) + O2(g) -> 2H2O(l) ΔH2 = -571.7 kJ/mol 3. C(graphite) + O2(g) -> CO2(g) ΔH3 = -393.5 kJ/mol.

answered 1 day ago in Chemical thermodynamics

1 answer 38 views

What is the boiling point of a substance with London dispersion forces and hydrogen bonding compared to a substance with only London dispersion forces, given that both substances have a similar molar mass and molecular size?

asked 6 days ago in Chemical bonding

1 answer 65 views

How do the components of a sample mix affect the separation and resolution of compounds during capillary electrophoresis analysis? Develop a protocol to optimize the separation and resolution of a mixture containing two or more compounds using capillary electrophoresis.

answered 6 days ago in Analytical Chemistry

1 answer 45 views

At a particular temperature and pressure, a mixture of water and ethanol has a vapor pressure of 45 torr. What is the mole fraction of ethanol in the mixture if its total pressure is 760 torr?

answered Jan 22 in Physical Chemistry

1 answer 23 views

Please evaluate the zoom-lens model of attention.

answered Jan 16 in Psychology

1 answer 21 views

Who developed the concept of ego, superego and id?

answered Jan 15 in Psychology

1 answer 37 views

What ethical issues are psychologists confronted with in their practice?

answered Jan 14 in Psychology

1 answer 35 views

What is the term used to describe the psychological process through which an individual develops their sense of self?

answered Jan 14 in Psychology

1 answer 55 views

What is the self-categorisation theory?

answered Jan 13 in Psychology

1 answer 6 views

Where are aerofoils found?

answered Jan 8 in Science

1 answer 22 views

What is the conversion of metals from their ores to more useful forms called?

asked Jan 6 in Science

1 answer 15 views

What is produced when haploid gametes fuse in sexual reproduction?

answered Jan 6 in Science

1 answer 26 views

What is a rigid layer that surrounds the plasma membrane of a plant cell?

answered Jan 6 in Science

1 answer 4 views

What are materials that are good conductors of thermal energy called?

answered Jan 3 in Science

1 answer 24 views

Thermodynamics do not give us any insight into what attribute of spontaneous processes?

answered Jan 2 in Science

1 answer 32 views

The simplest way to define a base is which kind of compound that produces hydroxide ions when dissolved in water?

answered Jan 2 in Science

1 answer 8 views

Prokaryotic cells have a cell wall located outside of the __________?

asked Dec 31, 2024 in Science

1 answer 31 views

Gases are most ideal at high temperature and what pressure?

asked Dec 30, 2024 in Science

1 answer 21 views

Evolution over a short period of time at the level of the population is called what?

answered Dec 30, 2024 in Science

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