Recent activity by HelenaGodoy5

1 answer 54 views

How can the concentration of a particular metal ion in a given sample be quantified using voltammetry and what are the factors that affect the accuracy of the measurement?

asked Jan 29 in Analytical Chemistry

1 answer 40 views

Calculate the enthalpy change for the isomerization of n-butane to iso-butane if the standard enthalpy of formation for n-butane is -125.7 kJ/mol and that for iso-butane is -147.4 kJ/mol. The isomerization reaction occurs at a constant pressure of 1 atm and at a temperature of 298 K.

answered Jan 23 in ThermoChemistry

1 answer 41 views

Calculate the bond dissociation energy of the nitrogen-nitrogen (N-N) bond in N2O4 given that the enthalpy change for the reaction 2N2O4(g) --> 4NO2(g) is -109.7 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 77 views

A student needs to prepare a buffer solution with a pH of 7.20 using acetic acid (CH3COOH) and sodium acetate (NaCH3COO), with a total buffer concentration of 0.20 M. What mass of CH3COOH needs to be added to 200 mL of 0.10 M NaCH3COO to obtain the desired pH? (Ka of CH3COOH is 1.8x10^-5)

asked Jan 22 in Chemical reactions

1 answer 43 views

What is the out-group homogeneity effect?

asked Jan 20 in Psychology

1 answer 8 views

What is the concept of demand characteristics in research?

answered Jan 15 in Psychology

1 answer 63 views

How do neural processes contribute to perceptual illusions?

asked Jan 15 in Psychology

1 answer 21 views

How does the temperament theory explain personality?

answered Jan 15 in Psychology

1 answer 5 views

What is the theory of perceptual load?

answered Jan 15 in Psychology

1 answer 23 views

What is selective attention?

asked Jan 14 in Psychology

1 answer 56 views

What is social learning theory?

answered Jan 13 in Psychology

1 answer 22 views

Which process breaks down glucose to extract energy for cell metabolism?

asked Jan 8 in Science

1 answer 24 views

What organ do mammals have that is exceptionally large for their body size?

asked Jan 7 in Science

1 answer 40 views

What kind of succession occurs in an area that has never before been colonized?

answered Jan 7 in Science

1 answer 8 views

What is the smallest and most fundamental unit of matter, consisting of a nucleus surrounded by electrons?

asked Jan 7 in Science

1 answer 25 views

What is the main function of the cardiovascular system?

answered Jan 7 in Science

1 answer 20 views

What is a measure of the force of gravity pulling on an object of a given mass?

asked Jan 6 in Science

1 answer 22 views

What happens when waves reach the shore?

answered Jan 6 in Science

1 answer 56 views

The properties of cyclic hydrocarbons are generally quite similar to those of the corresponding open-chain compounds. so cycloalkanes (with the exception of cyclopropane, which has a highly strained ring) act very much like noncyclic alkanes. cyclic structures containing five or six carbon atoms, such as cyclopentane and cyclohexane, are particularly what?

asked Jan 2 in Science

1 answer 11 views

Although surface waves are slowest, they do most of the damage of what event?

answered Dec 30, 2024 in Science

...