Recent activity by EvelyneShell

1 answer 40 views

What is the acidity or basicity of a molecule with the chemical formula HCOOH?

answered Feb 13 in Chemical bonding

1 answer 65 views

How does changing the concentration of one reactant affect the reaction rate and reaction order in a chemical reaction with multiple reactants?

answered Feb 3 in Chemical kinetics

1 answer 63 views

What is the concentration of iron (II) ion in a sample of drinking water using colorimetry, if the absorbance of the sample is found to be 0.294 and the molar absorption coefficient of iron (II) complex is 10,500 M^-1 cm^-1 at the wavelength of 505 nm?

asked Jan 30 in Analytical Chemistry

1 answer 57 views

How can the concentration of copper in a given sample of water be determined using spectrophotometry?

answered Jan 29 in Analytical Chemistry

0 answers 39 views

A chemical plant has a mixture of ethanol and water with a known composition. The plant wants to separate the mixture using a distillation column. As a chemistry student, design a feasible distillation column that can effectively separate the mixture with the given composition. You need to specify the height, diameter, number of trays, reflux ratio, and other necessary parameters needed for designing the column. You are also required to provide an explanation for the choice of each parameter.

asked Jan 22 in Psychology

1 answer 37 views

According to Maslow's hierarchy of needs theory, what is the second highest level of need?

answered Jan 20 in Psychology

1 answer 68 views

Compare and contrast the concepts of internal and external validity in theory evaluation

answered Jan 16 in Psychology

1 answer 36 views

What is the misinformation effect?

asked Jan 13 in Psychology

1 answer 44 views

What compound is formed when there are sparking electrical equipment?

answered Jan 6 in Science

1 answer 32 views

What are the three ways to classify matter based on how light interacts with it?

answered Jan 6 in Science

1 answer 35 views

The nervous system is made up of these?

answered Jan 2 in Science

1 answer 42 views

In how many ways ca a living organism obtain chemical energy

asked Dec 31, 2024 in Science

1 answer 46 views

Which disease afflicts children who don't get enough calcium during their bone formation stage?

answered Dec 28, 2024 in Science

1 answer 63 views

What system, which includes the skin, plays important roles in protection, sensing stimuli and thermoregulation?

asked Dec 27, 2024 in Science

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