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1. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron.
2. The iron atom of the heme group is almost entirely enclosed within the protein.
3. Each iron atom can form six coordination bonds: One of these bonds is formed between iron and oxygen.
4. Each hemoglobin or myoglobin molecule can bind four oxygen molecules.
5. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer.
6. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.
7. Molecular oxygen binds irreversibly to the Fe(II) atom in heme.
Aluminum and oxygen react according to the following equation: 4 Al (s) + 3 O2 (g) → 2 Al2O3 (s) What mass of Al2O3, in grams, can be made by reacting 4.6 g Al with excess oxygen
Assuming it is composed entirely of 206Pb, 207Pb and 208 Pb and the percentages of the two lightest isotopes are equal, calculate the relative percentages of these isotopes in the natural element.
the iron oxide reacts to form water vapor and Fe(s) but aluminum oxide remains unreacted. If the residue following heating weighs 1.6446g determine the wight percent of iron oxide in the original mixture.
Calculating percent purity from a reaction, One of the reactions that occurs in a blast furnace, where iron ore is converted to cast iron is Fe2O3 + CO = Fe + CO2.
a flask that can withstand an internal pressure of 2500 torr, but no more, is filled with a gas at 21.O C and 780 torr and heated. At what temperature will it burst?
Calculate the fraction of atoms in a sample of argon gas at 391 K that have an energy of 12.7 kJ
Isooctane (2,2,4-trimethylpentate), one of the many hydrocarbons that make up gasoline, burns in air to give water and carbon dioxide.
A disinfectant states that it will kill 99.9% of bacteria if left on for 45 minutes. What percentage of bacteria are killed if the disinfectant is left on only for 5 minutes
For 1-Chloropropane, draw 3 eclipsed, 2 gauche, and 1 anti conformations. Assume a chloro is the same size as a methyl group.
The addition of iodide (NaI or KI) often catalyzes SN2 reactions o alkyl chlorides or bromides. explain how by showing reaction equations of what happens.
Given the tabulated data, what is the lattice energy of crystalline calcium chloride?
An automobile gasoline tank holds 47kg of gasoline. When the gasoline burns, 165kg of oxygen are consumed and carbon dioxide and water are produced.What is the total combined mass of carbon dioxide and water that is produced?
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