Recent activity by Brigida91483

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How can students improve their preparation for chemistry-related careers, and what resources can they use to help them acquire the necessary skills and knowledge?

asked 6 hours ago in Chemical education

1 answer 53 views

Calculate the melting point of a solution containing 20 g of benzoic acid (C6H5COOH) and 80 g of naphthalene (C10H8). The melting points of pure benzoic acid and naphthalene are 122.4 °C and 80.2 °C, respectively. The molal freezing point depression constant for naphthalene is 6.8°C/m.

answered Jan 23 in Physical Chemistry

1 answer 55 views

Calculate the enthalpy change of the isomerization of but-2-ene to 2-methylpropene given the standard enthalpy of formation of but-2-ene is -20.4 kJ/mol and that of 2-methylpropene is -27.0 kJ/mol. The reaction is carried out at constant pressure and 298 K.

asked Jan 23 in ThermoChemistry

1 answer 52 views

Calculate the electrical double layer thickness of a silica particle with a radius of 50 nm, assuming the particle is in water at room temperature and has a surface charge density of -0.05 C/m².

answered Jan 23 in Physical Chemistry

1 answer 25 views

What are the implications of Vygotsky's theory for education?

answered Jan 20 in Psychology

1 answer 6 views

According to social influence theory, what is the role of informational social influence?

answered Jan 17 in Psychology

1 answer 19 views

According to Adler, why do individuals develop a particular personality?

answered Jan 16 in Psychology

1 answer 36 views

What is the difference between Piaget's and Vygotsky's theories of cognitive development?

asked Jan 13 in Psychology

1 answer 26 views

What type of treatment is necessary for anaphylaxis?

answered Jan 8 in Science

1 answer 26 views

What devices do astronomers use to see objects at wavelengths all across the electromagnetic spectrum?

asked Jan 6 in Science

1 answer 28 views

The enormous number of species is due to the tremendous variety of what?

answered Jan 2 in Science

1 answer 9 views

Starch and glycogen, as well as simple sugars like glucose and fructose, can all be categorized broadly as what?

answered Dec 31, 2024 in Science

1 answer 26 views

Find the overall magnification of what instrument by finding the magnification of the objective, then the magnification of the eyepiece?

asked Dec 30, 2024 in Science

1 answer 25 views

A reference point is used in measurement to make what?

asked Dec 30, 2024 in Science

1 answer 20 views

What is a simple sugar such as fructose or glucose?

asked Dec 28, 2024 in Science

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