Length and Distance Converter Weight Converter Bulk and Food Volume Converter Area Converter Volume and Cooking Units Converter Temperature Converter Pressure, Stress, Young's Modulus Converter Energy and Work Converter Power Converter Force Converter Time Converter Linear Velocity Converter Flat Angle Converter Thermal Efficiency and Fuel Efficiency Numeric Conversion Systems Converter of Information Quantity Measurement Currency Rates Women's Clothing and Shoes Sizes Men's Clothing and Shoes Sizes Angular Velocity and Rotational Rate Converter Acceleration Converter Angular Acceleration Converter Density Converter Specific Volume Converter Moment of Inertia Converter Moment of Force Converter Torque converter Specific calorific value (mass) converter Energy density and fuel calorific value (volume) converter Differential temperature converter Coefficient converter Thermal Expansion Curve Thermal Resistance Converter Thermal Conductivity Converter Specific Heat Capacity Converter Thermal Exposure and Radiation Power Converter Heat Flux Density Converter Heat Transfer Coefficient Converter Volumetric Flow Rate Converter Mass Flow Rate Converter Molar Flow Rate Converter Mass Flux Density Converter Molar Concentration Converter Mass Concentration in Solution Converter absolute) viscosity Kinematic viscosity converter Surface tension converter Vapor permeability converter Water vapor flux density converter Sound level converter Microphone sensitivity converter Sound pressure level converter (SPL) Sound pressure level converter with selectable reference pressure Luminance converter Luminous intensity converter Illumination converter Computer graphics resolution converter Frequency and Wavelength Converter Optical Power in Diopters and Focal distance Diopter power and lens magnification (×) Electric charge converter Linear charge density converter Surface charge density converter Bulk charge density converter Electric current linear current density converter Surface current density converter Electric field strength converter Electrostatic potential and voltage converter Electrostatic potential and voltage converter Electrical resistance converter Converter electrical resistivity Electrical conductivity converter Electrical conductivity converter Electrical capacitance Inductance converter American wire gauge converter Levels in dBm (dBm or dBmW), dBV (dBV), watts, etc. units Magnetomotive force converter Magnetic field strength converter Magnetic flux converter Magnetic induction converter Radiation. Ionizing Radiation Absorbed Dose Rate Converter Radioactivity. Radioactive Decay Radiation Converter. Exposure Dose Converter Radiation. Absorbed Dose Converter Decimal Prefix Converter Data Transfer Typography and Image Processing Unit Converter Timber Volume Unit Converter Calculating Molar Mass Periodic Table of Chemical Elements D. I. Mendeleev

Chemical formula

Molar mass MnBr 2, manganese (II) bromide 214.746049 g / mol

54.938049 + 79.904 2

Mass fraction of elements in the compound

Using the molar mass calculator

• Chemical formulas must be entered case sensitive
• Indices are entered as regular numbers
• The point on the midline (multiplication sign), used, for example, in the formulas of crystalline hydrates, is replaced by an ordinary point.
• Example: instead of CuSO₄ · 5H₂O, the converter uses the spelling CuSO4.5H2O for ease of input.

Molar mass calculator

Mole

All substances are made up of atoms and molecules. In chemistry, it is important to accurately measure the mass of substances that react and result from it. By definition, a mole is the SI unit of the amount of a substance. One mole contains exactly 6.02214076 × 10²³ of elementary particles. This value is numerically equal to the Avogadro constant N A, if expressed in units of mol⁻¹ and is called the Avogadro number. The amount of substance (symbol n) of the system is a measure of the number of structural elements. A building block can be an atom, molecule, ion, electron, or any particle or group of particles.

Avogadro's constant N A \u003d 6.02214076 × 10²³ mol⁻¹. Avogadro's number is 6.02214076 × 10²³.

In other words, a mole is the amount of a substance equal in mass to the sum of the atomic masses of atoms and molecules of a substance, multiplied by Avogadro's number. The unit of amount of a substance, mol, is one of the seven basic units of the SI system and is denoted by mol. Since the name of the unit and its symbol are the same, it should be noted that the symbol is not declined, unlike the name of the unit, which can be declined according to the usual rules of the Russian language. One mole of pure carbon-12 is exactly 12 g.

Molar mass

Molar mass is a physical property of a substance, defined as the ratio of the mass of this substance to the amount of substance in moles. In other words, it is the mass of one mole of a substance. In SI, the unit of molar mass is kilogram / mol (kg / mol). However, chemists are accustomed to using a more convenient unit of g / mol.

molar mass \u003d g / mol

Molar mass of elements and compounds

Compounds are substances made up of different atoms that are chemically bonded to each other. For example, the following substances that can be found in the kitchen of any housewife are chemical compounds:

• salt (sodium chloride) NaCl
• sugar (sucrose) C₁₂H₂₂O₁₁
• vinegar (acetic acid solution) CH₃COOH

The molar mass of chemical elements in grams per mole numerically coincides with the mass of the atoms of the element, expressed in atomic mass units (or daltons). The molar mass of compounds is equal to the sum of the molar masses of the elements that make up the compound, taking into account the number of atoms in the compound. For example, the molar mass of water (H₂O) is approximately 1 × 2 + 16 \u003d 18 g / mol.

Molecular mass

Molecular weight (formerly called molecular weight) is the mass of a molecule, calculated as the sum of the masses of each atom in a molecule multiplied by the number of atoms in that molecule. Molecular weight is dimensionless physical quantity, numerically equal to the molar mass. That is, the molecular weight differs from the molar weight in dimension. Despite the fact that molecular weight is a dimensionless quantity, it still has a quantity called atomic mass unit (amu) or dalton (Da), and approximately equal to the mass of one proton or neutron. The atomic mass unit is also numerically equal to 1 g / mol.

Calculation of molar mass

The molar mass is calculated as follows:

• determine the atomic masses of elements according to the periodic table;
• determine the number of atoms of each element in the compound formula;
• determine the molar mass by adding the atomic masses of the elements included in the compound, multiplied by their number.

For example, let's calculate the molar mass of acetic acid

It consists of:

• two carbon atoms
• four hydrogen atoms
• two oxygen atoms

• carbon C \u003d 2 × 12.0107 g / mol \u003d 24.0214 g / mol
• hydrogen H \u003d 4 × 1.00794 g / mol \u003d 4.03176 g / mol
• oxygen O \u003d 2 × 15.9994 g / mol \u003d 31.9988 g / mol
• molar mass \u003d 24.0214 + 4.03176 + 31.9988 \u003d 60.05196 g / mol

Our calculator does just that. You can enter the acetic acid formula into it and check what happens.

Do you find it difficult to translate a unit of measurement from one language to another? Colleagues are ready to help you. Post a question to TCTerms and you will receive an answer within a few minutes.

698 ° C Chemical properties Solubility in water 127.3 0; 228 100 g / 100 ml Classification Reg. CAS number 13446-03-2 PubChem 83471 The data for standard conditions (25 ° C, 100 kPa) unless otherwise stated.

Manganese (II) bromide - inorganic compound, metal salt manganese and hydrobromic acid with the formula MnBr 2, light pink crystals, soluble in water, forms crystal hydrates.

Receiving

• Vapors action bromine for powdered manganese:

$\backslash \backslash \; mathsf\; (Mn\; +\; Br\_2\; \backslash \backslash \; \backslash \backslash \; xrightarrow\; ()\; \backslash \backslash \; MnBr\_2)$

• The effect of hydrobromic acid on manganese carbonate

$\backslash \backslash \; mathsf\; (MnCO\_3\; +\; 2HBr\; \backslash \backslash \; \backslash \backslash \; xrightarrow\; ()\; \backslash \backslash \; MnBr\_2\; +\; CO\_2\; \backslash \backslash \; uparrow\; +\; H\_2O)$

Physical properties

Manganese (II) bromide forms light pink crystals trigonal system , space group P 3 m1 , cell parameters a \u003d 0.3820 nm, c \u003d 0.6188 nm, Z \u003d 1.

It dissolves well in water.

Forms crystalline hydrates of the composition MnBr 2 n H 2 O, where n \u003d 1, 2, 4 and 6.

The hexahydrate is formed at temperatures below 13 ° C.

it article preparation about inorganic substance. You can help the project by adding it.

Excerpt Characterizing Manganese (II) Bromide

The plate seemed to him not clean; he pointed to the spot and dropped it. Tikhon picked it up and handed it to the barman. The little princess was not unwell; but she was so overwhelmingly afraid of the prince that, hearing that he was out of sorts, she decided not to go out.
“I’m afraid for the child,” she said to m lle Bourienne. “God knows what fear can do.
In general, the little princess lived in Bald Hills constantly under a feeling of fear and antipathy towards the old prince, which she was not aware of, because fear so prevailed that she could not feel it. There was also antipathy on the part of the prince, but it was drowned out by contempt. The princess, having settled down in the Bald Mountains, especially fell in love with m lle Bourienne, spent days with her, asked her to spend the night with her, and often talked with her about her father-in-law and judged him.
- Il nous arrive du monde, mon prince, [Guests are coming to us, prince.] - said m lle Bourienne, unrolling a white napkin with her rosy hands. “Son excellence le rince Kouraguine avec son fils, a ce que j" ai entendu dire? [His Excellency Prince Kuraguine with his son, as far as I have heard?] "She said inquiringly.
“Hm… this excellence boy… I assigned him to the college,” the prince said insulted. - And why my son, I can't understand. Princess Lizaveta Karlovna and Princess Marya may know; I don't know why he is taking this son here. I don't need it. - And he looked at the reddened daughter.
- Unhealthy, or what? From the minister’s fear, as this fool Alpatych said today.
- No, mon pere. [father.]
No matter how unfortunate M lle Bourienne got on the subject of conversation, she did not stop and chatted about the greenhouses, about the beauty of the new blossoming flower, and the prince softened after the soup.
After dinner he went to see his daughter-in-law. The little princess sat at a small table and chatted with Masha, the maid. She turned pale when she saw her father-in-law.
The little princess has changed greatly. She was rather bad than good, now. The cheeks drooped, the lip went up, the eyes were drawn down.
- Yes, some kind of heaviness, - she answered the prince's question, what she felt.
- Do you need what?
- No, merci, mon pere. [thank you, father.]
- Well, good, good.
He went out and walked to the waiter's. Alpatych, bending his head, stood in the waiter's room.
- Is the road covered?
- Thrown over, your Excellency; forgive me, for God's sake, for one stupidity.
The prince interrupted him and laughed with his unnatural laugh.
- Well, good, good.
He extended his hand, which Alpatych kissed, and went into the office.
In the evening, Prince Vasily arrived. He was met at the roadside (as the avenue was called) by the coachmen and waiters, with a shout they drove his carts and sleighs to the outbuilding along a road covered with snow on purpose.
Prince Vasil and Anatol were given separate rooms.
Anatole was sitting, taking off his jacket and propping his hands on his hips, in front of the table, to the corner of which he, smiling, fixedly and absently fixed his beautiful large eyes. Throughout his life he looked at it as a continuous amusement, which for some reason someone undertook to arrange for him. In the same way, he now looked at his trip to the evil old man and to the rich ugly heiress. All this could come out, according to his assumption, very good and funny. Why not marry, if she is very rich? It never gets in the way, Anatole thought.
He shaved, perfumed himself with the thoroughness and panache that had become his habit, and with his natural, good-natured, victorious expression, carrying his handsome head high, he entered his father's room. Near Prince Vasily his two valets were busy dressing him; he himself looked animatedly around him and nodded cheerfully to his son who entered, as if he were saying: "So, that's how I need you!"
- No, no kidding, father, is she very ugly? AND? He asked, as if continuing the conversation he had more than once conducted during the trip.
- Completely. Nonsense! The main thing is to try to be respectful and reasonable with the old prince.
“If he scolds, I’ll leave,” said Anatole. - I can't stand these old people. AND?
- Remember that for you everything depends on it.
At this time, in the maiden's room, not only was the arrival of the minister with his son known, but the appearance of both of them was already described in detail. Princess Marya sat alone in her room and tried in vain to overcome her inner excitement.
“Why did they write, why did Liza tell me about it? After all, this cannot be! She said to herself, looking in the mirror. - How do I get out into the living room? If even I liked him, I would not be able to be with him by myself now. " The thought of her father's gaze terrified her.
The little princess and m lle Bourienne have already received all the information they need from the maid Masha about what a ruddy, black-browed handsome man the minister’s son was, and about how papa forced their legs up the stairs, and he, like an eagle, walking three steps, ran behind him. Having received this information, the little princess with m lle Bourienne, still heard from the corridor in their animatedly talking voices, entered the princess's room.
- Ils sont arrives, Marieie, [They arrived, Marie,] you know? - said the little princess, waddling her belly and sinking heavily into a chair.
She was no longer in the blouse in which she had sat in the morning, but she was wearing one of her best dresses; her head was carefully removed, and her face was full of animation, which, however, did not hide the drooping and dead outlines of her face. In the outfit that she usually wore in the societies in St. Petersburg, it was even more noticeable how much she had grown ugly. On m lle Bourienne, too, there was already imperceptibly some improvement in the outfit, which made her pretty, fresh face even more attractive.
- Eh bien, et vous restez comme vous etes, chere princesse? She said. - On va venir annoncer, que ces messieurs sont au salon; il faudra descendre, et vous ne faites pas un petit brin de toilette! [Well, but you stay, what were you wearing, princess? Now they will come to say that they have left. You will have to go downstairs, and you at least dress up a little!] 698 ° C Chemical properties Water solubility 127.3 0; 228 100 g / 100 ml Classification Reg. CAS number 13446-03-2 PubChem 83471 Reg. EINECS number SMILES InChI
Codex Alimentarius Lua error in Module: Wikidata on line 170: attempt to index field "wikibase" (a nil value). RTECS Lua error in Module: Wikidata on line 170: attempt to index field "wikibase" (a nil value). ChemSpider Lua error in Module: Wikidata on line 170: attempt to index field "wikibase" (a nil value). Data are based on standard conditions (25 ° C, 100 kPa) unless otherwise noted.

Manganese (II) bromide - an inorganic compound, a metal salt of manganese and hydrobromic acid with the formula MnBr 2, light pink crystals, soluble in water, forms crystalline hydrates.

Receiving

• Effect of bromine vapor on powdered manganese:

texvc not found; See math / README for setup help.): \\ Mathsf (Mn + Br_2 \\ \\ xrightarrow () \\ MnBr_2)

• Effect of hydrobromic acid on manganese carbonate

Unable to parse expression (Executable texvc not found; See math / README for setup help.): \\ Mathsf (MnCO_3 + 2HBr \\ \\ xrightarrow () \\ MnBr_2 + CO_2 \\ uparrow + H_2O)

Physical properties

Manganese (II) bromide forms light pink trigonal crystals, space group P 3 m1 , cell parameters a \u003d 0.3820 nm, c \u003d 0.6188 nm, Z \u003d 1.

It dissolves well in water.

Forms crystalline hydrates of the composition MnBr 2 n H 2 O, where n \u003d 1, 2, 4 and 6.

The hexahydrate is formed at temperatures below 13 ° C.

Forms adducts of the MnBr 2 type with ammonia n NH 3, where n = 1, 2, 6.

Chemical properties

• Crystalline hydrate loses water step by step when heated:

Unable to parse expression (Executable texvc not found; See math / README for setup help.): \\ Mathsf (MnBr_2 \\ cdot 6H_2O \\ \\ xrightarrow [-2H_2O] (13 ^ oC) \\ MnBr_2 \\ cdot 4H_2O \\ \\ xrightarrow [-2H_2O] (80 ^ oC) \\ MnBr_2 \\ cdot 2H_2O)

Write a review on the article "Manganese (II) bromide"

Literature

• Chemical encyclopedia / Editorial board: I.L. Knunyants and others .. - M .: Soviet encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5.
• Chemist's Handbook / Editorial Board: B.P. Nikolsky. and others .. - 2nd ed., rev. - M.-L .: Chemistry, 1966 .-- T. 1. - 1072 p.
• Chemist's Handbook / Editorial Board: B.P. Nikolsky. and others .. - 3rd ed., rev. - L.: Chemistry, 1971. - T. 2. - 1168 p.
• Ripan R., Chetianu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1972 .-- T. 2.- 871 p.

View this template Dimarganese arsenide (Mn 2 As) Manganese arsenide (MnAs) Manganese (II) acetate (Mn (CH 3 COO) 2) Manganese (III) acetylacetonate () Manganese boride (MnB) Manganese (II) bromide (MnBr 2) Manganese hexacarbonyl (Mn (CO) 6) Manganese (II) hydroxide (Mn (OH) 2) Manganese (II) hydrogen orthophosphate (MnHPO 4) Decacarbonyldimanganese (Mn 2 (CO) 10) Manganese diboride (MnB 2) Dihydrogen phosphate manganese (II) (Mn (H 2 PO 4) 2) Pentamanganese dinitride (Mn 5 N 2) Trimanganese dinitride (Mn 3 N 2) Manganese disilicide (MnSi 2) Trimanganese diphosphide (Mn 3 P 2) Manganese (II) iodide ( MnI 2) Manganese metahydroxide (MnO (OH)) Trimanganese carbide (Mn 3 C) Manganese carbides Manganese (II) carbonate (MnCO 3) Barium manganate (BaMnO 4) Potassium manganate (K 2 MnO 4) Sodium manganate (Na 2 MnO 4 ) Manganese acid (HMnO 4) Manganese (II) metasilicate (MnSiO 3) Manganese (II) nitrate (Mn (NO 3) 2) Dimarganese nitride (Mn 2 N) Tetramanganese nitride (Mn 4 N) Manganese (II) oxide (MnO ) Manganese (II, III) oxide (Mn 3 O 4) Manganese (II, IV) oxide (Mn 5 O 8) Manganese (III) oxide (Mn 2 O 3) Manganese (IV) oxide (MnO 2) Manganese oxide ( VI) (MnO 3) Manganese (VII) oxide (Mn 2 O 7) Manganese (II) orthosilicate (Mn 2 SiO 4) Manganese (II) orthophosphate (Mn 3 (PO 4) 2) Potassium permanganate (KMnO 4) Lithium permanganate (LiMnO 4) Sodium permanganate (NaMnO 4) Silver permanganate (AgMnO 4) Manganese (II) pyrophosphate (Mn 2 P 2 O 7) Dimarganese silicide (Mn 2 Si) Manganese silicide (MnSi) Manganese (II) sulfate (MnSO 4) Manganese (III) sulfate (Mn 2 (SO 4) 3) Manganese (IV) sulfate (Mn (SO 4) 2) Manganese (II) sulfide (MnS) Sulfide Manganese (IV) (MnS 2) Sodium tetraoxomanganate (V) (Na 3 MnO 4) Manganese (II) thiocyanate (Mn (SCN) 2) Dimarganese phosphide (Mn 2 P) Manganese phosphide (MnP) Tetramanganese phosphide (Mn 4 P) Trimanganese phosphide (Mn 3 P) Manganese (II) fluoride (MnF 2) Manganese (III) fluoride (MnF 3) Manganese (IV) fluoride (MnF 4) Manganese (II) chloride (MnCl 2) Manganese (III) chloride (MnCl 3) This time everything looked ominous and even frightening. We found ourselves in some dark, unpleasant room, as if it were a real evil prison. In a tiny, dirty, damp and fetid room, on a wooden couch with a straw mattress, sat a thin, gray-haired woman, exhausted by suffering, dressed in black, in whom it was absolutely impossible to recognize that fabulously beautiful, always smiling miracle queen, which young Axel is most of all loved in the world ... Marie Antoinette at the Temple He was in the same room, completely shocked by what he saw and, not noticing anything around, stood on his knee, pressing his lips to her still beautiful white hand, unable to utter a word ... He came to her completely desperate, having tried everything in the world and lost the last hope to save her ... and yet, again offered his almost impossible help ... He was obsessed with a single desire: to save her, no matter what ... He simply could not allow her die ... Because without her, his life, already unnecessary to him, would have ended ... They looked at each other in silence, trying to hide the disobedient tears that flowed down their cheeks in narrow paths ... Unable to take their eyes off each other, because they knew that if he could not help her, this look could be their last .. ... The bald jailer looked at the grief-stricken guest and, not intending to turn away, watched with interest the sad scene of someone else's sadness unfolding in front of him ... The vision disappeared and another appeared, no better than the previous one - an eerie, screaming, armed with pikes, knives and rifles, a brutal crowd ruthlessly destroyed the magnificent palace ... Versailles ... Then Axel appeared again. Only this time he was standing by the window in some very beautiful, richly furnished room. And next to him stood the same "friend of his childhood" Margarita, whom we saw with him at the very beginning. Only this time all her arrogant coldness disappeared somewhere, and her beautiful face literally breathed participation and pain. Axel was deathly pale and, pressing his forehead against the window pane, watched with horror what was happening on the street ... He heard the crowd rustling outside the window, and in a terrifying trance he loudly repeated the same words: - My soul, I never saved you ... Forgive me, my poor ... Help her, give her the strength to endure it, Lord! .. - Axel, please! .. You have to pull yourself together for her. Well, please be sensible! An old friend persuaded him with participation. - Prudence? What prudence are you talking about, Margarita, when the whole world has gone crazy?! .. - Axel shouted. - What is it for? For what? .. What did she do to them ?! Margarita unfolded a small piece of paper and, apparently not knowing how to calm him down, said: - Calm down, dear Axel, listen better: - “I love you, my friend ... Don't worry about me. I just miss your letters. Perhaps we are not destined to meet again ... Farewell, the most beloved and most loving of people ... ". It was the last letter from the queen, which Axel read thousands of times, but for some reason it sounded even more painful from someone else's mouth ... - What is it? What's going on there? - I could not resist. - This beautiful queen is dying ... She is now being executed. - Stella answered sadly. - Why can't we see? I asked again. - Oh, you don't want to look at this, trust me. - The baby shook her head. - It's a pity, she's so unhappy ... How unfair. - I would still like to see ... - I asked. - Well, look ... - Stella nodded sadly. On a huge square, jam-packed with "inflated" people, in the middle a scaffold towered ominously ... A deathly pale, very thin and exhausted woman, dressed in white, proudly climbed up the small, crooked steps. Her short-cut blonde hair was almost completely hidden by a modest white cap, and a deep hopeless sadness was reflected in her tired eyes, reddened from tears or insomnia ... Slightly swaying, since, because of the tightly tied hands behind her back, it was difficult for her to maintain balance, the woman somehow climbed onto the platform, still trying with all her strength to keep straight and proudly. She stood and looked into the crowd, not lowering her eyes and not showing how really she was terribly scared ... And there was no one around whose friendly look could warm the last minutes of her life ... warmth could help her withstand this horrible moment when her life had to leave her in such a cruel way ... Before that, the raging, excited crowd suddenly suddenly fell silent, as if it had run into an insurmountable obstacle ... The women in the front rows were silently crying. A slender figure on the scaffold went up to the block and stumbled a little, painfully fell to her knees. For a few short seconds, she raised her exhausted face, but already pacified by the proximity of death, to the sky ... she took a deep breath ... and proudly looked at the executioner, laid her tired head on the block. The crying grew louder, the women closed their eyes to the children. The executioner approached the guillotine ... - Lord! Not!!! Axel cried heartbreakingly. At the same moment, in the gray sky, the sun suddenly peeped out from behind the clouds, as if illuminating the last path of the unfortunate victim ... It gently touched her pale, terribly emaciated cheek, as if affectionately saying the last earthly "forgive". It flashed brightly on the scaffold - a heavy knife fell, scattering bright crimson splashes ... The crowd gasped. The blond head fell into the basket, it was all over ... The beautiful queen went to a place where there was no more pain, there was no bullying ... There was only peace ...