Recent activity by BerylSantiag

1 answer 52 views

How can Raman spectroscopy be used to identify the presence of specific compounds in a sample, and what are the advantages and disadvantages of this analytical technique compared to other methods such as infrared spectroscopy or mass spectrometry?

asked Jan 29 in Analytical Chemistry

1 answer 51 views

How can atomic absorption spectroscopy be used to quantitatively determine the concentration of lead (Pb) in a water sample taken from a local river? What steps must be taken to prepare the sample and calibrate the spectroscopic instrument? How can the results be verified and reported?

answered Jan 29 in Analytical Chemistry

1 answer 44 views

Calculate the activation energy of a reaction that has a rate constant of 8.23 x 10^-4 s^-1 at 300 K and a rate constant of 1.56 x 10^-2 s^-1 at 350 K.

answered Jan 23 in Chemical kinetics

1 answer 67 views

A chemistry student needs to determine the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)At a certain temperature, 0.2 mole of nitrogen gas (N2), 0.3 mole of hydrogen gas (H2), and 0.4 mole of ammonia gas (NH3) were placed in a 1 L container. Using these initial concentrations, what is the equilibrium constant (Kc) for the reaction?

asked Jan 22 in Chemical equilibrium

1 answer 16 views

What is ethnomethodology's role in discursive psychology?

answered Jan 16 in Psychology

1 answer 13 views

What is the main criticism of discursive psychology's focus on language?

asked Jan 16 in Psychology

1 answer 5 views

Who proposed the rational choice theory?

answered Jan 16 in Psychology

1 answer 20 views

What is depth perception?

asked Jan 14 in Psychology

1 answer 46 views

Which type of electrons plays the most important role in chemical reactions?

answered Jan 8 in Science

1 answer 63 views

What is the term for the process in which water vapor changes to tiny droplets of liquid water?

answered Jan 7 in Science

1 answer 20 views

What is the substance called whenatoms of different elements join together?

asked Jan 7 in Science

1 answer 20 views

What is the largest object in the solar system?

asked Jan 7 in Science

1 answer 30 views

What is a hydrocarbon in which there are only single covalent bonds?

asked Jan 6 in Science

1 answer 17 views

The use of mercury-based dental amalgam has gone under question in recent years because of concerns regarding what?

asked Jan 2 in Science

1 answer 46 views

In a fuel cell, energy is not stored; electrical energy is provided by what?

answered Dec 30, 2024 in Science

1 answer 50 views

At the earth’s surface, the air pressure exerted on you is a result of the weight of what above you?

asked Dec 27, 2024 in Science

...