Recent activity by HarrisMagoff

1 answer 58 views

How can the concentration of an unknown substance in a sample be determined using spectrophotometry? Develop a step-by-step protocol for the student to follow in order to accurately quantify the amount of the substance in the sample.

asked Jan 29 in Analytical Chemistry

1 answer 58 views

How can the concentration of a particular substance in a given sample be determined using colorimetry, and what are the factors that affect the accuracy of the measurement?

answered Jan 29 in Analytical Chemistry

1 answer 53 views

A student needs to determine the amount of copper present in a sample of brass using coulometry. If the sample is dissolved in acid and subjected to coulometric analysis using a standard silver electrode, what is the concentration of copper (in ppm) in the brass sample?

answered Jan 22 in Analytical Chemistry

1 answer 7 views

A sample of gas at 25°C and 2 atm is expanded suddenly against a constant external pressure of 1 atm. Calculate the change in entropy of the gas as it expands irreversibly.

answered Jan 22 in Physical Chemistry

1 answer 8 views

Why is the dopamine hypothesis significant?

answered Jan 20 in Psychology

1 answer 25 views

According to Piaget, how do cognitive schemas change?

asked Jan 15 in Psychology

1 answer 27 views

Who proposed the self-evaluation maintenance theory of self-esteem?

answered Jan 15 in Psychology

1 answer 31 views

What is the only known planet with large amounts of water?

asked Jan 7 in Science

1 answer 31 views

What are known as the building blocks of proteins?

asked Jan 3 in Science

1 answer 22 views

Blood volume increases substantially during pregnancy, so that by childbirth, it exceeds its preconception volume by 30 percent, or approximately what?

asked Dec 30, 2024 in Science

1 answer 26 views

An ammeter must be connected in series with what to allow it to accurately measure the current flow without causing any disruptions?

answered Dec 30, 2024 in Science

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