Recent activity by BennieHeitma

1 answer 33 views

Consider the metalloprotein hemoglobin, which has four heme groups each coordinated to a single iron ion. Suppose that ferrous iron in the heme group of hemoglobin is oxidized to ferric state by reacting with hydrogen peroxide. Calculate the number of hydrogen peroxide molecules needed to oxidize all the iron ions of hemoglobin in a human body that has a total of 5 liters of blood, assuming the concentration of hemoglobin in blood is 15 grams per liter.

asked 2 days ago in Coordination Chemistry

1 answer 33 views

Calculate the standard free energy change for the following redox reaction under standard conditions:2 Fe3+ (aq) + H2 (g) → 2 Fe2+ (aq) + 2 H+ (aq)Given: Standard reduction potential of Fe3+ / Fe2+ = -0.771 V Standard reduction potential of H+ / H2 = 0.00 V

asked 2 days ago in Chemical thermodynamics

1 answer 48 views

A chemistry student needs to determine the percent composition of nitrogen (N) in a sample of an unknown organic compound. Using elemental analysis, the student determines the mass of the sample to be 0.254 g and the mass of the products after combustion to be 0.727 g of CO2 and 0.298 g of H2O. What is the percent composition of nitrogen in the sample?

answered Jan 22 in Analytical Chemistry

1 answer 45 views

How does the CYP3A4 enzyme affect the metabolism and potential interactions of commonly prescribed drugs in the treatment of cardiovascular disease?

answered Jan 22 in Medicinal Chemistry

1 answer 48 views

According to the social-cognitive theory, what is the basis for human behaviour?

asked Jan 20 in Psychology

1 answer 22 views

Compare the different types of motivation in psychology.

asked Jan 20 in Psychology

1 answer 22 views

Who created the concept of character strengths?

answered Jan 17 in Psychology

1 answer 46 views

How does biopsychology explain mental disorders?

answered Jan 17 in Psychology

1 answer 26 views

What is the difference between primary and secondary emotions?

asked Jan 14 in Psychology

1 answer 17 views

What is the survey method?

asked Jan 13 in Psychology

1 answer 13 views

What rigid layer surrounds the cell membrane of a plant cell?

asked Jan 7 in Science

1 answer 62 views

What is the term for the use of two or more lewis structures to represent the covalent bonding in a molecule?

answered Jan 7 in Science

1 answer 44 views

What effect causes global winds to blow on a diagonal over the earth's surface?

answered Jan 6 in Science

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