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# How many molecules are contained in 127 grams of iodine

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• How many grams Iodine in 1 mol? The answer is 126.90447. We assume you are converting between grams Iodine and mole. You can view more details on each measurement unit: molecular weight of Iodine or mol The molecular formula for Iodine is I. The SI base unit for amount of substance is the mole. 1 grams Iodine is equal to 0.0078799430784432 mole
• The mass of one mole of iodine atoms = 126.9 g . Number of moles = 127 ÷ 126. I assume that the teacher has rounded the mass of one mole of iodine atoms to 127 grams. Number of moles = 127 ÷ 127 = 1. The mass of one mole of iodine molecules, I2 = 2 * 127 = 254 g. Number of moles = 100 ÷ 254. 1 mole of anything is 6.02 * 10^23 things
• b. iodine c. silver d. sulfur... At STP, an element that is brittle solid and a poor conductor of heat and electricity could have an atomic number of a. 12 b. 13 How many molecules are contained in 127 grams of Iodine (I2) a. 1.50 * 10 ^ 23 b. 3.01 * 10 ^ 23 c. 9.03 * 10 ^ 2
• 39.How many molecules are contained in 127 grams of iodine (I2)? A) 12 × 1023 B)9.0 × 1023 C) 3.0 × 1023 D) 6.0 × 1023 40.What is the total number of atoms in a 30. gram sample of neon? A)1.50 moles B) 2.00 moles C) 6.02 moles D) 9.03 moles 41.What is the total number of moles of hydrogen gas contained in 9.03 × 1023 molecules
• Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black non-metallic solid at standard conditions that melts to form a deep violet liquid at 114 degrees Celsius, and boils to a violet gas at 184 degrees Celsius.However, it readily sublimes with gentle heat, resulting in a widespread misconception even.
• Other articles where Iodine-127 is discussed: iodine: Occurrence and distribution: isotope of iodine is stable iodine-127. An exceptionally useful radioactive isotope is iodine-131, which has a half-life of eight days. It is employed in medicine to monitor thyroid gland functioning, to treat goitre and thyroid cancer, and to locate tumours of the brain and of the liver
• We assume you are converting between moles Iodine and gram. You can view more details on each measurement unit: molecular weight of Iodine or grams The molecular formula for Iodine is I. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iodine, or 126.90447 grams Molecules are converted into moles by just dividing the molecules by the Avogadro's number, also known as the Avogadro's Constant. Avogadro constant is the number of atoms or molecules, that are contained in one mole of any substance, which is equal to 6.02 x 10 23.Avogadro Constant was named after the scientist Amedeo Avogadro (H and I are diatomic molecules, meaning they are paired together in nature under normal conditions, so you need a coefficient of 2 in front of the hydrogen iodide) Now, some stoichiometry! Molar mass of HI = 1.008 g H + 126.9 g I = 127.91 g HI. 25.4 g HI * (1 mol HI / 127.91 g HI) * (1 mol I2 / 2 mol HI) * (253.8 g I2 / 1 mol I2) = 25.20 g I 3. What fraction of iodine-125 has decayed if there are 37.5 grams left from the original sample? 4. If 130 days have passed approximately how many grams of iodine-125 will remain? 5. What is the half-life of iodine-125? 6. If 315 days have passed, how many grams of iodine-125 will remain undecayed? 7. What mass of iodine-125 has decayed after.

### Molecule - Molecule Restposte

1. Iodine is one of the elements in group 17, called the halogens. While there are larger elements in this group (astatine and tennessine), but these are not very stable and do not form molecules.
2. e how many molecules (then how many atoms) are in the Cl2. You just recognize that you have 50/70.9 = 0.705 mols Cl2 so 50/70.9 mols I2 will contain the same number of I2 molecules (and atoms)
3. How many MOLECULES of carbon monoxide are present in 8.39 grams of this compound ? 1.80E+23 molecules. 2. How many GRAMS of carbon monoxide are present in 9.45E+22 molecules of this compound ? 4.40 grams. Feedback: The formula for carbon monoxide is CO = 28.0 g/mol 1 mole = 6.02 x 10 23 things = Avogadro's number 1. To convert grams to molecules
4. #1.00 moles I_2 = 6.02 * 10^(23)molecules I_2# The answer must be rounded to three sig figs, the number of significant figures you have for the number of moles of iodine crystals. Notice that each iodine molecule contains #2# atoms of iodine, #2 xx I#, which means that #1# mole of iodine molecules contains #2# moles of iodine atoms
5. e how many grams would contain that many moles So, Avogadro's number tells you how many molecules you get in one mole of a given substance. In order to have one mole of iodine, you need to have #6.022 * 10^(23)# molecules of iodine
6. For this you need the atomic (molecular) mass of I2. Take the number of grams and divide it by the Atomic Mass. Multiply by one mole for units to cancel. I2=253.8 grams12.7 grams I2 / (253.8 grams.

The number of moles of iodine that can be made from 16.4 grams of NaIO3 is calculated as below calculate the moles of the molecules moles= mass/molar mass = 16.4g/197.89 g/mol= 0.082 moles since we have 1 atom of Iodine in NaIO3 the moles of iodine =0.082 mole Q. How many moles of Na contain 1.45x10 21 atoms of Na? (to find moles, divide atoms by Avogadro's number So what is the ratio between molecules PI3 and 3 I in the molecule? Solving: = 1.62E+22 MOLECULES x (3 atoms I / 1 MOLECULE PI3) = 1.82E+23 ATOMS I {note how units are used} Now use avogadro's number to convert to MOLES of ATOMS. = 1.82E+23 x ( 1 mole atoms/ 6.023E+23 atoms) = 0.302 moles I. Now convert 0.302 moles to grams How many grams of iodine are there in a 5g sample of thyroxine? 777 g of thyroxine has 127*4 = 508 g of iodine. In 5 g of iodine there are (5/777)*508 = 3.268 g of iodine. It contains 1. Example #3: 0.450 gram of Fe contains how many atoms? Example #4: 0.200 gram of H 2 O contains how many molecules? Look at the solution steps in the image above and you'll see we have to go from grams (on the left of the image above) across to the right through moles and then to how many atoms or molecules

Mole Concept: A mole (expressed as mol) is defined as that amount of a substance that contains as many numbers of atoms or molecules or ions as contained in 12 grams of Carbon Iodine-131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the half-life of iodine-131 is 8.02 days. if a hospital receives a shipment of 200.0g of iodine-131, how much iodine-131 would remain after 3

15. n gram of a substance X-reacts with m gram of substance Y to from p gram of substance R and q gram of substance S. This reaction can be represented as follows X + Y = R + S The relation which can be established in the amounts of the reactants and the products will be (a) n - m = p - q (b) n + m = p + q (c) n = m (d) p = q 16. One atom. How many molecules are in 0.033 mol of carbon dioxide? 7.40 x 10^15 sulfide ions convert to how many moles of sulfide ions? If 3.0 x 10^46 molecules of water are in a glass, how many moles of water are in the glass? How many grams of ground iodine do we need to react completely with this amount of aluminum How many GRAMS of iodine are present in 2.97*104 molecules of phosphorus triiodide ? grams of iodine. A compound is found to contain 31.14 % sulfur and 68.83 % chlorine by mass. To answer the question, enter the elements in the order presented above That is, the molar mass of a substance is the mass (in grams per mole) of 6.022 × 10 23 atoms, molecules, or formula units of that substance. In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively Grams to Atoms Calculator is a free online tool that displays the conversion from grams to atoms for the particle. BYJU'S online grams to atoms calculator tool makes the conversion faster and it displays the conversion to atoms in a fraction of seconds

### Convert grams Iodine to moles - Conversion of Measurement

6. How many electrons, protons, and neutrons does an iron -55 atom hav e? 7. What are isotopes? 8. Calculate the molar mass, in g/mol, of Fe 2 (CO 3) 3. 9. How many ICl 3 molecules are present in 1.75 kg of ICl 3? 10. A compound with a percent composition by mass of 87.5% N and 12.5% H was recently discovered. What is the empirical formula for. 5)Which sample contains a mole of atoms? 1) 1.50 × 10 23 2) 3.01 × 10 23 3) 9.03 × 10 23 4) 12.4 × 10 23 6)How many molecules are contained in 127 grams of iodine (I 2 ) Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass Grams to Atoms Calculator is a free online tool that displays the conversion from grams to atoms for the particle. BYJU'S online grams to atoms calculator tool makes the conversion faster and it displays the conversion to atoms in a fraction of seconds 2. How many molecules are there in 4.00 moles of glucose, C6H120 ? 4 00 3. How many moles are I .20 x 1025 atoms of phosphorous? 4. How many atoms are in 0.750 moles of zinc? 5. How many molecules are in 0.400 moles of N205? o.qoo Mole-Mass Conversions l. How many moles in 28 grams of C02 ? Gram-formula-mass of C02 1 C = I x 12.01 g = 12.01

Direct reaction of iodine (I 2 ) and chlorine (Cl 2 ) produces an iodine chloride, I x Cl y , a bright yellow solid. If you completely consume 0.678 g of I 2 in a reaction with excess Cl 2 and produce 1.246 g of I x Cl y , what is the empirical formula of the compound? A later experiment showed that the molar mass of I x Cl y was 467 g/mol The iodine number is the mass of iodine, in grams, that is consumed by (reacts with) 100 grams of a fat or an oil. Iodine reacts with the carbon-carbon double bonds. Thus the greater the number of double bonds, the higher the iodine number. In general, fats have lower iodine numbers than oils because oils have greater percentages of carbon. 9. Calculate the pressure needed to contain 2.44 mol of an ideal gas at 45 oC in a volume of 3.70 L. P = nRT V P = (2.44 mol)(0.0821 L·atm/mol·K)(318 K) = 17.2 atm 3.70 L 10. (a) How many molecules are in 1.00 L of gaseous oxygen if the pressure is 2.50 x 10-9 torr and the temperature is 1225 K? (b) How many grams of O2 are in the container

31. An oxide of iodine(I=127) contains 25.4g of iodine and 8g of oxygen. its formula could be A) I2O3 B)I2O C) I2O5 D)I2O7. 32. The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be (A) 29 (B) 58 (C) 35.5 (D) 71. C. STOICHIOMETRY: 33 Problem2 A 22.0 gram sample of carbon dioxide gas has a volume of 904 milliliters at a pressure of 2.78 atm. The temperature of the CO 2 gas sample is -212 o C. Feedback: Assume that the behavior of the gas follows the ideal gas law: PV = nRT For R = 0.08206 L atm/mol K, pressure must be expressed in atmospheres, volume in liters, and temperature in Kelvins

### Chemistry Test Number 2 Flashcards - Questions and Answers

• Atomic Mass of Iodine. Atomic mass of Iodine is 126.90447 u. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The unit of measure for mass is the atomic mass unit (amu). One atomic mass unit is equal to 1.66 x 10-24 grams
• ed by rearranging equation 1, since N t, N 0, and t 1/2 are known. This means that the fossil is 11,460 years old. Derivation of the Relationship Between Half-Life Constant
• e the number of neutrons in an atom of I-127. [1
• How many H 2 O molecules are there in a snowflake weighing 1 mg? (a) 3.35 x 10 19 (b) 6.023 x 10 23 (c) 335 x 10-19 (d) 100 Answer: (a) 3.35 x 10 19 Hint: 1 mg of H 2 O Molar mass of H 2 O = 2 + 16 = 18 g 1 Mole contains 6.023 x 10 23 water molecules 18 g contains 6.023 x 10 23 water molecules
• One mole of atoms of oxygen has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains 6.02 X 10 23 atoms of oxygen. One mole of oxygen gas, which has the formula O 2, has a mass of 32 g and contains 6.02 X 10 23 molecules of oxygen but 12.04 X 10 23 (2 X 6.02 X 10 23) atoms, because each molecule of oxygen contains two oxygen atoms
• When we ask, for example, how many moles of Iodine (or Oxygen or Hydrogen) is contained in 100g? It ALWAYS refers to the molecule (e.g. I2, O2, H2 etc). Therefore, the number of 6.02 x 10^23 refers to the number of molecules, not atomes of Iodine and therefore you actually have 12.04 x 10^23 atomes of Iodine contained in one mole of molecular.
• e the number of neutrons in an atom of I-127.  83 Explain, in terms of protons and neutrons, why I-127 and I-131 are different isotopes of iodine.  85 Deter
1. ed from the chemical formula and molar masses of elements Each H 2O molecule contains 2 H atoms and 1 O atom Each mole of H 2O molecules contains 2 moles of H and 1 mole of O One mole of O atoms corresponds to 15.9994
2. A mixture of 0.0375 g of hydrogen and 0.0185 mol oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form? Which reactant is in excess, and how many grams of it remain after the reaction
3. Iodine atoms have 53 electrons and 53 protons with 7 valence electrons in the outer shell. Characteristics and Properties Under standard conditions iodine is a dark blue-black solid. Iodine crystals can sublimate directly from a solid to a gas. As a gas, iodine is a purple vapor

### Iodine - Wikipedi

• But iodine is a diatomic element, existing in molecules of 2 iodine atoms bound together (I2). So the molecular weight of I2 is 2 x 127 = 254g/mole. Moles = mass/MW, so moles = 450g/(254g/mole)
• d the volume of your sample, so you can make other calculations, such as grams per liter. For a 25 ml juice sample, for example: 0.15 g / 25 ml = 0.15 g / 0.025 L = 6.00 g/L of vita
• In science we weigh in grams so the . Relative Atomic Mass is in g/mol (gmol-1) 1 mole of Iodine contains 1 mole of individual I 2 molecules. 1 mole of Iodine contains 1 mole of individual I 2 molecules. Iodine is 127 I.
• WebMD - Better information. Better health

Iodine is an essential micronutrient. The nutritional requirement for iodine (under review by WHO) is currently considered to be in the range of 0.10 to 0.14 mg per person per day for adults (see potassium iodate).The Committee set a provisional maximumtolerable daily intake of 1 mg iodine/day (0.017 mg/kg bw) from all sources. This level may cause adverse effects for some individuals, e.g. Ibuprofen, C 13 H 18 O 2, is the active ingredient in many nonprescription pain relievers. Its molar mass is 206.29 g/mol. a. If the tablets in a bottle contain a total of 33 g of ibuprofen, how many moles of ibuprofen are in the bottle? b. How many molecules of ibuprofen are in the bottle? c. What is the total mass in grams of carbon in 33 g.

### Iodine-127 chemical isotope Britannic

Mole & Molar Mass Mole (mol): the amount of material counting 6.02214 × 1023 particles The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12. 12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 1023 atoms The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 1023). 6.022 ×1 ChemActivity 29 Chemical Equations 169Exercises7. How many grams of Cr2S3 are produced when the reaction in Ex. 1a (above) occurs with 10.0 grams of chromium being consumed?8. How many grams of hydrogen sulfide are produced when 0.0365 grams of carbon disulfide are consumed in the reaction in Ex. 1d?9 Atoms, Molecules, and Ions, Chemistry and Chemical Reactivity 7th - John C. Kotz, Paul M. Treichel, John R. Townsend | All the textbook answers and step-by-st Our Discord hit 10K members! ������ Meet students and ask top educators your questions

### Convert moles Iodine to grams - Conversion of Measurement

• The iodine incorporation in gorgonia seems to increase with age.43,44 The proteins of many different gorgonia species contain substantial iodine: Eunicella otenocalloides 6.5-8.9% by weight%, Gorgonia verrucosa 4.2-9.0, G. lamarcki 3.3-6.8, G. scirpearia 0.4-0.6, Rhipidigorgia flabellum 0.6-1.1, Euplexora maghrebensis 0.19-0.23, and Plexaura.
• Ethylene oxide is an organic compound with the formula C 2 H 4 O.It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms.Ethylene oxide is a colorless and flammable gas with a faintly sweet odor. Because it is a strained ring, ethylene oxide easily participates in a number of addition reactions that result in ring-opening
• How many moles of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass? 78 . A cough syrup contains 5.0% ethyl alcohol, C 2 H 5 OH, by mass

Iodine (I), chemical element, a member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. atomic number 53 atomic weight 126.9044 melting point 113.5 °C (236 °F) boiling point 184 °C (363 °F) specific gravity 4.93 at 20 °C (68 °F) oxidation states −1, +1, +3, +5, +7 electro Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ioeidēs, meaning violet or purple, due to the color of elemental iodine vapor.1 Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers. Iodine's relatively high atomic number, low toxicity, and ease of attachment to organic compounds. She places 15 grams of baking soda into a beaker. Next she adds 15 grams of vinegar to the same beaker. When the two compounds make contact, they bubble and fizz a great deal. She places the beaker on the balance and notes that the mass of the solution in the beaker is less than the expected 30 grams How many molecules of iodine are liberated if 546 g of chlorine react with excess sodium iodide? 2 24 2 2 23 2 2 2 2 4.63 x 10molecules I 1 mol I 6.02 x 10 moleculesI 1 mol Cl 1mol 71 g Cl Cl x 546 g Cl 10. ___ Cu + ___ AgNO 3 ___ Cu(NO 3) 2 + ___ Ag How many grams of silver will be produced if 86 g of copper are used? 292 g Ag 1 mol Ag 108 g A To convert from moles to molecules multiply the molar amount of the molecule by Avogadro's number. The Avogadro's number is a dimensionless quantity and is equivalent to the Avogadro constant. The Avogadro's Constant is equal to 6.02214179x10 23 for one mole of substance. In the below calculator enter the value for 'Mole' and click convert for.

When a person takes KI, the stable iodine in the medicine gets absorbed by the thyroid. Because KI contains so much stable iodine, the thyroid gland becomes full and cannot absorb any more iodine—either stable or radioactive—for the next 24 hours. KI (potassium iodide) may not give a person 100% protection against radioactive iodine How many moles of gaseous boron trifluoride, BF 3, are contained in a 4.3410 L bulb at 788.0 K if the pressure is 1.220 atm? How many grams of BF 3? Iodine, I 2, is a solid at room temperature but sublimes (converts from a solid into a gas) when warmed. What is the temperature in a 73.3 mL bulb that contains 0.292 g of I 2 vapor at a pressure. 23 will contain 6.022 x 10 molecules of SO 2. 2. Each SO 2 molecule contains 2 atoms of oxygen. Therefore, the number of oxygen atoms is twice the number of SO 2 molecules. 3. The sample of SO 2 contains 0.253 mol x (6.022 x 10 23 molecules / 1 mol) = 1.52 x 1023 molecules of SO 2. 4. The number of oxygen atoms is obtained by multiplying the.

CHEM 107 Exam II Chapters 11, 4, 5, and 6 This exam is a combination of 19 short answer, multiple choice, fill in the blank and diagrams/structures. You will have one week to complete the exam by 11:59pm. There is no penalty for submitting the exam early. If you are unable to complete the exam by April 14 th, please keep in communication with me whenever possible How many water molecules are there in 1g of water, H 2 O ? formula mass of water = (2 x 1) + 16 = 18; every mole of a substance contains 6 x 10 23 particles of 'it' (the Avogadro Constant). moles water = 1 / 18 = 0.0556; molecules of water = 0.0556 x 6 x 10 23 = 3.34 x 10 2 2. Calculate the number of moles of the substance that contains the following number of representative particles. a.8.92 x 10 23 atoms of barium. b.5.50 x 10 25 molecules of carbon monoxide . c.2.66 x 10 22 formula units of potassium iodide . 3. Determine the mass in grams of each of the following quantities. a. 1.24 moles of berylliu Olive oil is composed mainly of triacylglycerols (triglycerides or fats) and contains small quantities of free fatty acids (FFA), glycerol, phosphatides, pigments, flavor compounds, sterols, and microscopic bits of olive. Triacylglycerols are the major energy reserve for plants and animals. Chemically speaking, these are molecules derived from the natural esterification o Search term: gram stain iodine Compare Products: Select up to 4 products. *Please select more than one item to compare. 4 matches found for gram stain iodine . Advanced Search | Structure Search. Crystal Violet. 1 Product Result.

6. The atomic mass of Mg is 24, and the atomic mass of Cl is 35.5. One mole of MgCl 2 1) represents 95 molecules of the compound. 3) contains 35.5 molecules of chlorine. 2) represents 95 grams of the compound. 4) contains 2 moles of chlo­rine molecules The molar amount of iodine is derived by multiplying the provided molar amount of aluminum by this factor: How many molecules of Zn(CN) 2 are produced by the reaction of 35.27 g of K[Ag(CN) 2]? If gasoline contains 84.2% carbon by mass and has a density of 0.8205 g/mL, determine the mass of carbon dioxide produced during a 500-mile trip.

Chemistry: Stoichiometry Please help me to solve these problems. Ignore question 1 and 2. Also number 22-26 are repeated 3 times. I wil post the problems in the additional files. Also please type down how to solve the problems. Chemistry: Stoichiometry 1. How many moles of O2 should be supplied to burn 1 mol of [ With the atomic mass of 127 g/mole and with two iodine atoms in each iodine molecule, I 2 has a molecular mass of approximately 254 g/mole. So, for a Gastly that has a mass of 0.09 kg, 0.09 kg = 90 grams (90 grams) x (1 mole/254 grams) = 0.35 mole Neutron Number and Mass Number of Iodine. Mass numbers of typical isotopes of Iodine are 127. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N.Neutron number plus atomic number equals atomic mass number: N+Z=A.The difference between the neutron number and the atomic number is known as the neutron excess: D = N - Z = A.

Supplements containing kelp, a seaweed that contains iodine, are also available. A small study found that people absorb potassium iodide almost completely (96.4%) . Many multivitamin/mineral supplements contain iodine, often at a dose of 150 mcg , and some, but not all, prenatal supplements contain iodine The iodine atoms are added as anions, and each has a 1− charge and a mass number of 127. Determine the numbers of protons, neutrons, and electrons in one of these iodine anions. Solution. The atomic number of iodine (53) tells us that a neutral iodine atom contains 53 protons in its nucleus and 53 electrons outside its nucleus The iodine we consume in food is non-radioactive iodine (I-127), but we take in radioactive I-131 and deposit it in the thyroid gland just as we do with I-127. This is why the I-131 uptake test is used to examine thyroid function

### Molecules To Moles Calculator,Converte

19. A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of definite proportion would predict that a 67 gram sample of chemical X should contain how many grams of carbon? a. 5.0 grams b. 6.7 grams c. 10. grams d. 15 grams e. 19 grams 20 0.450 gram of Fe contains how many atoms? 0.200 gram of H 2 O contains how many molecules? Look at the solution steps and you'll see we have to do two steps of working to go from grams (on the left) across to the right through moles and then to the number of atoms or molecules In this video well learn to convert moles of NaCl to grams. The technique used can be applied to any mole to gram conversion. For our practice problem we'l..

Peptidoglycan Definition. Peptidoglycan, also called murein, is a polymer that makes up the cell wall of most bacteria.It is made up of sugars and amino acids, and when many molecules of peptidoglycan joined together, they form an orderly crystal lattice structure.Bacteria are classified as being either Gram-positive or Gram-negative based in differences in the structure of their peptidoglycan. Q8. How many molecules and atoms of phosphorus are present in 0.1 moles of P4 molecules? Q9. How many silver atoms are present in a piece of jewellery weighing 10.78 g? Ag = 107.8 a.m.u. Q10. What weight of calcium contains the same number of atoms as per present in 3.2g of sulphur? Q11 To convert from moles to molecules multiply the molar amount of the molecule by Avogadro's number. The Avogadro's number is a dimensionless quantity and is equivalent to the Avogadro constant. The Avogadro's Constant is equal to 6.02214179x10 23 for one mole of substance. In the below calculator enter the value for 'Mole' and click convert for.

### how many grams of solid iodine are produced by the

6. State how many mole ratios can be written for a chemical reaction involving three substances. n 3, thus (n)(n 1) (3)(2) 6 mole ratios 7. Categorize the ways in which a balanced chemical equation can be interpreted. particles (atoms, molecules, formula units), moles, and mass 8. Apply The general form of a chemical reac-tion is xA 2H and 2HyB. Gram atomic mass contains 6.022 x 10 23 atoms, gram molecular mass contains 6.022 x 10 2j molecules whereas gram formula mass contain 6.022 x 10 23 formula units. All of these quantities represent molar mass. Mass of one mole of a substance expressed in gram is called molar mass Fred A. Mettler Jr. MD, MPH, Milton J. Guiberteau MD, in Essentials of Nuclear Medicine Imaging (Sixth Edition), 2012 Iodine-123. Iodine-123 has excellent physical properties for an imaging agent. Like 131 I, its biochemical behavior is identical to that of stable iodine. Iodine-123 decays by electron capture, with a photon energy of 159 keV and a half-life of 13 hours How many grams of ice would be melted by the energy obtained as 16.7 g of steam is condensed at 100°C and cooled to 0°C? specific heat (ice) = 2.10 J/g°C specific heat (water) = 4.18 J/g°C heat of fusion = 333 J/g heat of vaporization = 2258 J/

### An atom of iodine (I) has an atomic mass of 127 amu

• ed, so we use an approximate value of 6.022 x 10 23. So, you know how many atoms are in a mole
• Commercially, iodine is obtained in several ways, such as taking iodine vapor from processed brine, by ion exchange of brine or by releasing iodine from iodate taken from nitrate ores. Isotopes: 34 whose half-lives are known, with mass numbers 108 to 141. Naturally occurring iodine consists of the one stable isotope: 127
• Of the thirty-seven known isotopes of iodine, only one occurs in nature, iodine-127.The others are radioactive and have half-lives too short to be primordial.As such, iodine is monoisotopic and its atomic weight is known to great precision, as it is a constant of nature. The longest-lived of the radioactive isotopes of iodine is iodine-129, which has a half-life of 15.7 million years, decaying.
• How many grams of oxygen are in this sample? (C u = 6 3. 5) 1 0 0 g of ethyl alcohol-water mixture contains 1 mol of ethyl alcohol. What is molar ratio of ethyl alcohol and water in the mixture? View solution. [Atomic wt. of Iodine = 127] View solution. The molar mass of O 3.

Q.4 180 grams of glucose and 342 gram of sucrose have the same number of molecules but different number of atoms present in them. Ans. 180 grams of glucose (C 6 H 12 O 6 ) and 342 grams of sucrose (C 12 H 22 O 11 ) are their molar masses indicating one mole of each (glucose and sucrose) one mole of a substance contains equal number of molecules. This compound contains 1.6 grams of X atoms for every 3.8 grams of fluorine atoms. The atomic mass of element X is most likely to be (A) 16 amu (B) 32 amu (C)64 amu it was determined that a 8.65-g sample of this compound contained 1.75 x 1022 molecules. Calculate the molar mass of this compound. (g) Determine the molecular formula of this. 8. Bottle A contained 0.80 mol of methanol (CH 3 OH) and bottle B contained 4.0 x 1023 molecules of ethanol (C 2 H 5 OH). a) Which bottle contains the greatest number of molecules? b) Which bottle contains the greatest mass of substance? 9. A 8.0 g sample of a compound made up of carbon, hydrogen and oxygen contains 3.0 g of C, 4.0 g of O and 1. 17. Gaseous iodine IF 5 can be prepared by the reaction of solid iodine and gaseous fluorine: I 2 (s) + 5 F 2 (g) 2 IF 5 (g) A 5.00-L flask is charged with 10.0 g of I 2 and 10.0 g of F 2, and the reaction proceeds until one of the reagents is completely consumed. After the reaction is complete the temperature in the flask is 125 C

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