Hemoglobin, an oxygen-carrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the molecules mass. What is the molecular weight of hemoglobin?

16,921 results
  1. Hemoglobin, an oxygen-carrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the molecules mass. What is the molecular weight of hemoglobin?

    Thanks!

  2. hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecule and contains .340 percent iron by mass. calculate the molar mass of hemoglobin!

    thanks! :)

  3. hemoglobin is the oxygen-carrying molecule of red blood cells,consisting of a protein and a nonprotein substance is called heme.a sample of heme weighing 35.2 mg contains 3.19 mg of iron.if heme molecule contains one atom of iron,what is the molecular

  4. Hemoglobin is the oxygen carrying molecule of red bloods and contains 4 atoms of iron per molecule of hemoglobin. A sample of hemoglobin weighing 13.4 g contains 45.6 mg iron. What is the molecular mass of hemoglobin?

    I'm unsure of where to begin with this

  5. The hemoglobin content of blood is about 15.4g/100mL blood. The molar mass of hemoglobin is about 64500 g/mol, and there are four iron (Fe) atoms in a hemoglobin molecule.Approximately how many Fe atoms are present in the 6 L of blood in a typical adult?

    [(

  6. When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this observation?

    The iron atoms in iron oxide have more mass than pure iron. There are more iron atoms in iron oxide than in pure iron. The

  7. Rust contains an iron-oxygen compound in which there are three oxygen atoms for each two iron atoms. In this compound, the iron to oxygen mass ratio is 2.325:1. Another compound of iron and oxygen contains these elements in the ratio of 2.616:1. What is

  8. hemoglobin is the protein that transports O2 through the blood from the lungs to the rest of the body. in doing so, each molecule of hemoglobin combines with four molecules of O2. if 1.00 g of hemoglobin combines with 1.53 mL of O2 at 37 C and 743 torr,

  9. what transition metal complex is responsible for transporting oxygen in our blood? Also, what is its structure?

    The transition metal (there are several transition series---I assume you are referring to the 3d transition metals) is iron. As to its sturcure,

  10. 4Fe + 3O2 = 2Fe2O3

    So in math book it say " You can interpret this equation in terms of representative particles by saying that four atoms of iron react with three molecules of oxygen to produce two formula unit of iron(iii) oxide" Why it say that there are

  11. Q1) Refer to the chemical equation of rusting of iron and the image of the iron oxide molecule. 4Fe + 3O2 --> 2Fe O3 Draw a model that shows electron transfer when iron and oxygen chemically react to form rust.

  12. 2. Which of the following is responsible for carrying nutrients to and waste from the body’s cells? (1 point)

    plasma red blood cells red and white blood cells white blood cells 3. _________ defend the body against disease. (1 point) Fibrin Red blood cells

  13. 2. Which of the following is responsible for carrying nutrients to and waste from the body’s cells? (1 point)

    plasma red blood cells red and white blood cells white blood cells 3. _________ defend the body against disease. (1 point) Fibrin Red blood cells

  14. The atomic mass of iron oxide is 160 atomic mass units. What is the atomic mass of iron if a molecule of iron oxide consists of tow atoms of iron and three atoms of oxgen?

  15. Which of the following events are not examples of a chemical reaction?

    atoms of gold turning into atoms of iron conversion of methane, which contains carbon and hydrogen, and oxygen into carbon dioxide and water <<<? the rusting of iron in a humid

  16. A glass of skim milk supplies 0.1 mg of iron and 8.2 g of protein. A quarter pound of lean red meat provides 3.75 mg of iron and 21 g of protein. If a person on a special diet is to have 7.36 mg of iron and 73 g of protein, how many glasses of skim milk

  17. one reason carbon monoxide(CO) is toxic is that it binds to the blood protein hemoglobin more strongly than oxygen does. The bond between hemoglobin and CO absorbs radiation of 1953 cm^-1. (the units are the reciprocal of the wavelength in centimeters).

  18. The density of iron is 7.87 g/cm3, and the average mass for one iron atom is 9.28×10-23 g.

    How many atoms are there in a rectangular iron ingot measuring 3.00 cm × 3.00 cm × 9.00 cm?

  19. Write the balanced chemical reaction for the rusting of iron?

    the acidic vinegar dissolved a protective coating off the steel wool, allowing the oxidation of the steel to begin. This process is called rusting. In this reaction, iron(III) is combined with

  20. A glass of skim milk supplies 0.1 mg of iron and 8.2 g of protein. A quarter pound of lean red meat provides 3.75 mg of iron and 21 g of protein. If a person on a special diet is to have 7.36 mg of iron and 73 g of protein, how many glasses of skim milk

  21. A glass of skim milk supplies 0.1 mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4 mg of iron, 22 g of protein, and 20 g of carbohydrates. Two slices of whole-grain bread supply 2.2 mg of iron, 10 g of

  22. 1.) The protein that carries oxygen in our blood is known as

    A. Anemia B. Hemoglobin C. Amino acid D. Messenger RNA

  23. can some one help me with a few chem questions please.

    A chunk of iron weighs 4.32 g. a) How many iron atoms are there in this sample? 55.85 g Fe = 1.00 mol Fe = 6.022 x 1023 atoms Fe b) How many moles of iron are there in this sample? 2. . You have a

  24. Hemoglobin is a critical oxygen-carrying protein. The protein functions as a tetramer with two α-globin subunits and two β-globin subunits. Individuals homozygous for a specific single point mutation in the region that encodes the sixth amino acid in

  25. name the gas transporting protein molecule present in the blood ? why this molecule is employed to transport oxygen but not carbondioxide.

  26. 1.   Which statement is true about the following molecule?  (1 point)The molecule is composed of four atoms.The molecule contains oxygen atoms.The molecule is water.The molecule represents an element.

    2. A(n) _____________ is made up of two or more

  27. 1. Which elements are most abundant in living organisms?

    A. hydrogen, carbon, calcium, potassium, oxygen, and phosphorus B. oxygen, calcium, phosphorus, sodium, hydrogen, and carbon C. carbon, potassium, iron, magnesium, hydrogen, and nitrogen D. oxygen,

  28. When iron rusts in air, iron(III) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in the rusting reaction?

  29. Iron pyrite (FeS2) is the form in whichmuch of

    the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to acid

  30. I have trouble understanding ratios and relativity so I can't understand how to use atomic mass units. Here is an example from my book:

    How many grams of iron would contain the same number of iron atoms as the number of carbon atoms contained in 1.000 g of

  31. Please answer the following questions clearly:

    1a) (ii) Why would a 15 year old male need more calcium than a 30 year old male? (iii) Why does a 25 year old pregnant female need more protein than a non-pregnant 25 year old female? 1b) A hammer hits a nail,

  32. When iron rusts in air, iron (III) oxide is produced. How many moles of oxygen react with 7.2 mol of iron in the rusting reaction? 4Fe(s)+3O2=2Fe2O3(s)

  33. Iron pyrite (FeS2) is the form in which much of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce

    iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to

  34. Iron pyrite (FeS2) is the form in whichmuch of

    the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to acid

  35. One reason carbon monoxide (CO) is toxic in that it bind to the blood protein hemoglobin more

    strongly than oxygen does. The hemoglobin – CO bond absorbs radiation of 1953 cm–1, which are in units of wavenumbers. Wavenumber is defined as the reciprocal

  36. One reason carbon monoxide (CO) is toxic in that it bind to the blood protein hemoglobin more

    strongly than oxygen does. The hemoglobin – CO bond absorbs radiation of 1953 cm–1, which are in units of wavenumbers. Wavenumber is defined as the reciprocal

  37. Iron metal and oxygen gas combine to form the magnetic oxide of iron, Fe3O4 and 680 kJ of heat. How many kilojoules of heat are generated when 750. grams of iron are reacted with an excess amount of oxygen gas?

  38. when the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe203.in a certain experiment, 20.00g of iron metal was reacted with 11.20g of oxygen gas. After the experiment the iron was totally consumed and 3.56g

  39. An iron wire has a cross-sectional area equal to 1.20 10-5 m2. Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 34.0 A.

    (a) How many kilograms are there in 1.00 mole of iron? 1

  40. How many moles of iron(iii) chloride could be made with an unlimited supply of iron atoms but only 1.81 X 10e23 chlorine atoms?

  41. Please help me with these AP Chemistry homework problems and show me the steps how to find the solutions:

    Liquid-Liquid Tirations: What is the concentration of the unkown solution for each of the following titrations? #5) 25.36 mL of 0.178 M NaOH is

  42. When iron metal reacts with oxygen, the reaction can form Fe203. The balanced chemical equation I think is right is 4 Fe + 302----2Fe203. So I have 4 moles of iron + 3 moles of oxygen creates 2 moles of iron oxide. I need to find the number of moles of

  43. iron metal & oxygen combine to form magnetic oxide of iron, Fe3O4. How many mols of iron can be converted to magnetic by 8.80 mols of pure oxygen?

  44. 2. Which of the following explains why the heart is organized so that it pumps blood to two different locations?

    A. to supply blood to two different sides of the body B. to allow a way for the blood to pick up new blood cells C. to move oxygen-poor blood

  45. I am having a hard time figuring out how to write a balanced equation for the reaction of iron and oxygen to produce iron(II) oxide.

    I also need a balanced equation for the reaction of iron and oxygen to produce iron (III) oxide. I would appreciate any and

  46. A couple questions here:

    1. How do you expect nitriding to change the properties of iron? a) Nitriding makes iron stronger. b) Nitriding makes iron weaker. c) Nitriding makes iron more electrically conductive. d) Nitriding makes iron less electrically

  47. in an experiment of oxgen to hydrogen in water molecule. 9g of iron were heated in a current of hydrogen,6.5g of iron and 2.8g of water were formed using this data. determine the proportion by mass of oxygen to hydrogen in water

  48. Could someone please let me know if I am on the right track with this paragraph and feel free to critique me very strictly as my instructor will do.

    My assignment was to explain what is in whole blood and what is the purpose of red cells,platelets and

  49. 1. Iron reacts with oxygen according to the following equation:

    Fe + O2→ Fe2O3 a. Balance the equation. b. Assuming you start with 15.0 g of iron, how many dm3 of oxygen are required to react? c. How many molecules of oxygen is this?

  50. Would iron be considered a substance or a mixture? How about blood?

    Iron is: http://en.wikipedia.org/wiki/Iron substance is a very general term: See definition 3: http://www.m-w.com/dictionary/substance Now blood is living tissue and as such very complex.

  51. determine the mass of the following example 1.3 x 10^26 iron atoms in iron III oxide, mass of iron II oxide

    I know this is a 2 part question and you have to use Avogadro's number, but I am clueless as to how to solve it.

  52. The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 166 yards with a 7-iron, how far should he average with a 5-iron?

  53. The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 127 yards with a 7-iron, how far should he average with a 5-iron?

  54. The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 153 yards with a 7-iron, how far should he average with a 5-iron

  55. Is blood a substance or mixture? Is iron a substance or mixture? I think blood and iron are both substances but my friend thinks that blood is a mixture and iron is a substance. PLEASE HELP ME!!!!!!

    Substance is a very general term. Every piece of matter in

  56. Please be specific. In an experiement 23.4 g of iron sulphide, FeS are added to excess oxygen, and 16.5 of Iron oxide, Fe2O3 are produced. The balanced euation for the reaction is 4FeS =7O2 -- 2Fe2O +2SO2. Calculate the percent yield of iron oxide in the

  57. Thermite is a mixture of iron(III) oxide and aluminum powders that is used in some countries to weld railroad tracks. It is a spectacular reaction to yield solid aluminum oxide that floats on the molten iron. When cooled, the iron is ground smooth and even

  58. How do catalysts affect a chemical reaction?

    lose activation energy provide activation energy increase activation energy lower activation energy*** What does the forward arrow in a chemical equation mean? The reaction is reversible. The reaction proceeds

  59. The protein that carries oxygen in our blood is known as hemoglobin.

    Which statement accurately describes sickle cell anemia? It affects the functions of red blood cells of humans. How are DNA and mRNA related? DNA is used as a template to make mRNA.

  60. Based on the law of definite composition, Dalton proposed that one atom of carbon combines with two atoms of oxygen to always produce CO2.

    Similarly,he proposed that two atoms of hydrogen combine with one atom of oxygen to give a molecule of H2O.

  61. The specfic heat of iron is 0.11cal/g C. The heat of fusion of iron, the heat required to convert iron from a solid to liquid at its melting point, is 63.7cal/g. Iron melts at 1530 C. How much heat must be added to 2g of iron at 25c to completely melt it?

  62. why iron 56 has highest binding energy than oxygen 16 , although oxygen 16 more stable than iron 56 ???

  63. 1. Which of the following is not a function of the circulatory system?

    breaks down large molecules delivers oxygen to body cells **** takes carbon dioxide away from body cells fights infection 2. Which of the following explains why the heart is organized so

  64. 1. Which of the following is not a function of the circulatory system?

    breaks down large molecules delivers oxygen to body cells **** takes carbon dioxide away from body cells fights infection 2. Which of the following explains why the heart is organized so

  65. 1. Glucose is a simple sugar made up of carbon, hydrogen, and oxygen. What kind of molecule is glucose?

    A) Glucose is protein B) Glucose is a nucleic acid*** C) Glucose is an organic molecule D) Glucose is an inorganic molecule 2. Glucose is a simple sugar.

  66. Could someone let me know if I have balanced these equations correctly. balanced equation of the reaction of iron and oxygen to produce iron(ii)oxide.

    2Fe + O2 = 2FeO Also if the balanced equation of the reaction of iron and oxygen to produce

  67. The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressures of oxygen: 0.20 atm of oxygen at one point and 0.0010 atm of oxygen

  68. Equation: Fe+CuCl2>FeCl2+Cu

    We put two iron nails into the copper chloride solution:1. mass of empty dry beaker:103.64 2. mass of two iron nails, before reaction:1.20 3. mass of two iron nails after reaction: 1.01 4. mass of beaker and copper (dry):104.4

  69. In an experiement 23.4 g of iron sulphide are added to excess oxygen and 16.5 grams of iron (III) oxide, Fe2O3 are produced the balanced equation for the reaction is 4FeS + 7O2 -- 2Fe2O3 + 2SO2

    Calculate the percent yield of iron oxide in the experiement

  70. Iron (III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen?

    a. 12.0g b. 23.9g c. 47.8g d. 95.6g

  71. Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen?

  72. Which of the following is an organic molecule? A. Oxygen gas B. Sucrose C. Iron oxide D. Water

  73. a) An equilibrium exists between three chemical species in the blood , Hemoglobin, oxygenated hemoglobin and oxygen. Using the symbols Hb for hemoglobin , O2 for oxygen and HbO2 for oxygenated hemoglobin write out the equilibrium reaction. If you have

  74. How many moles of iron atoms are in

    22.37 g of iron (II) sulfide, FeS?

  75. If 111.70 g of iron react with oxygen gas to produce iron (III) oxide, how many moles of oxygen gas will be needed?

  76. I looked and could not find anything on iron smelting? Could you explain to me why it is a chemical process?

    Iron ore is a chemical compound, it has to be decomposed into iron + other. Surely you jest!!! I went to www.google.com and typed in Iron smelting

  77. If 3.18 x 1023 atoms of iron react with 67.2 L of chlorine gas at STP, what is the maximum number of grams of iron (III) chloride that can be produced?

  78. How many atoms of iron will react with an excess of sulfur to form 3.098 grams of iron (II) product? Fe + S ---> FeS (2.12x10*25)

    I would appreciate if an explanation would be given... I need more than just the answer. Thank you!

  79. 5. How many grams of iron oxide can be produced from 2.50 g of oxygen reacting with iron, according to the following equation?

    2 Fe (s) + 3 O2 (g) -->2 Fe2O3(s)

  80. 5. How many grams of iron oxide can be produced from 2.50 g of oxygen reacting with iron, according to the following equation?

    2 Fe (s) + 3 O2 (g) -->2 Fe2O3(s)

  81. Given the equation: 4 Fe + 3 O2 -> 2 Fe2O3

    - If I react 5.75 g iron with 3.00 g oxygen, what is the LR? - What is the theoretical yield of iron(III) oxide?

  82. 7.77 g of rush (an oxide of iron) is heated until all the O2 atoms combine with charcoal. When this is done, a pellet of pure iron with a mass of 5.44 g remains. What is the empirical forumla for rust?

  83. What mass of iron(III) oxide is produced when 8 g of iron metal reacts completely with oxygen gas?

  84. I want a balanced chemical equation for iron+oxygen=iron oxide please

  85. 1.5173 g of organic iron compound containing FE , C ,H and O is burnt in oxygen gas produced 2.838 g OF carbon dioxide and 0.8122 g of water. In separate experiment to determine the mass % of iron, 0.3355 g of the compound yielded 0.0758 g iron (II) oxide.

  86. Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?

  87. Solud iron and steam react at high temperatures to form iron(vi) peroxide and hydrogen gas. How much solid iron is needed to obtained 405 grams of iron(vi) peroxide, with a 84.2% yield?

  88. please balance this chemical equation iron +oxygen > iron (III) oxide +energy

    Fe + O2> Fe2 O3 + heat and light

  89. A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the

  90. A blacksmith at a historical reenactment is making an iron hinge. after placing the iron (0.750 kg) in the fire and shaping it with his hammer it is still at 200 C. he puts the iron piece in an 8 L bucket of water at 25 C. what is the final temp. of the

  91. Iron(III) oxide is formed when iron combines with oxygen in the air. What is the mole ration of Fe used and the mole of Iron(iii) oxide produced? 4Fe(s) + 3O2(g) > 2Fe2O3(s)

    a - 3:2 b - 4:3 c - 4:2 d - 3:4 Can someone help?

  92. 6.52 g of oxygen gas reacts with some amount of iron, and 11.50 g of Fe2O3 are formed. What was the amount of iron that reacted with the oxygen?

  93. Iron ores have different amounts of iron per kilogram of ore.

    Calculate the mass percent composition of iron for each iron ore: Fe2O3{\rm Fe_2O_3} (hematite), Fe3O4{\rm Fe_3O_4} (magnetite), FeCO3{\rm FeCO_3} (siderite).

  94. the ratio of the distances a 7-iron and a 5- iron will dirve a golf ball is 5 to 6. if a golfer averages 153 yards with a 7- iron, how far should he averages with a 5-iron?

  95. Write the numbers in order of increasing size.

    1/2,3/4,2/3,0.95 Convert to standard notation. 1.91 x 10-4 The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 153 yards with a 7-iron how far should he

  96. how many molecules are in 5.5 moles of oxygen gas? How many atoms are in this quantity of gas?

    I used dimensional analysis and did: 5.5 mol. of oxygen x 6.02x10^23 molecules/1 mol of oxygen I got 3.3x^24 molecules of oxygen How do I find the # of atoms? I

  97. Can someone explain to me how 2,3 BPG works for hemoglobin?

    BPG affects oxygen binding affinity by binding in a small cavity at the center axis of deoxygenated hemoglobin. In oxygenated hemoglobin, this cavity is too small to effectively accommodate

  98. What is one mole of H2O composed of?

    A. 2 hydrogen atoms and 1 oxygen atom B. 2 × (6.02 × 1023) hydrogen atoms and 6.02 ×1023 oxygen atoms C. 3 atoms of water and 2 oxygen molecules D. one half of a molecule of peroxide I say A

  99. A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL sample required 31.0 mL of a 0.0185mol/L solution of potassium dichromate. Calculate the percentage of iron in the wire.

  100. A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL sample required 31.0 mL of a 0.0185mol/L solution of potassium dichromate. Calculate the percentage of iron in the wire.

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20