Bromine molar mass

E.3 In your new nanotechnology lab you have the capability to manipulate individual atoms. The atoms on the left are bromine atoms (molar mass 80 g-mol L), those on the right are atoms of calcium (molar mass 40 g-mol" 1). How many calcium atoms would have to be added to the pan on the right for the masses on the two pans to be equal ... 

A hydrocarbon is 90% carbon by mass and 10% hydrogen by mass and has a molar mass of 40 g-mol It decolorizes bromine water, and 1.46 g of the hydrocarbon reacts with 1.60 L of hydrogen (measured at STP) in the presence of a nickel catalyst. Write the molecular formula of the hydrocarbon and the structural formulas of two possible isomers. 

Selective radical bromination of the p-methyl group by elemental bromine is performed in solution either thermally, photolytically, or in the presence of radical initiators. The reaction does not lead to any change in molar mass or distribution, and the only potential side reaction, which has to be controlled by adjusting the reaction conditions, is debromination between two p-bromobenzyl moieties. Under similar conditions radical chlorination leads to substitution on the benzylic site as well as on the methylene and methyl groups of isobutene units, with changes in molar mass. 

This molar mass is closest to bromine, so the formula is AgBr. 

Iodine monochloride and elemental bromine have nearly the same molar mass and liquid density but very different boiling points. 

An unsaturated hydrocarbon of molar mass 80gmol reacts with bromine. If 0.2S0g of hydrocarbon reacts with l.OOg of bromine, what is the equation for the reaction ... 

On hydrolywby aqueous sodium hydroxide, A gives an oily liquid, B. B has the percent compoatkm mass C. 77.1% N, 15.1% H, 7.5%, and a molar mass of 93 gmoI . B is basic and gives a precipitate with bromine water. 

The fact that rubber cannot be distilled also seems to suggest low-molar-mass cyclic compounds held together by partial valence. It was known that associated substances have a much higher boiling point than nonassociated ones. Pickles/ on the other hand, suggested the even now accepted chain structure for rubber. As proof of constitution he carried out the first relevant polymer modification, namely, the addition of bromine across the double bonds of rubber. Since the bromine addition did not alter the molecular size. Pickles considered natural rubber to be a true molecule. However, his conclusions were not generally accepted. 

A flammable gas made up only of carbon and hydrogen is found to effuse through a porous barrier in 1.50 min. Under the same conditions of temperature and pressure, it takes an equal volume of bromine vapor 4.73 min to effuse through the same barrier. Calculate the molar mass of the unknown gas, and suggest what this gas might be. 

Relationship between Molecule and Mole A molecule is the smallest unit of a molecular substance (e.g., Br2), and a mole is Avogadro s number (6.022 X 10 ) of molecules of that substance. A mole of bromine (Br2> has the same number of molecules as a mole of carbon dioxide, a mole of water, or a mole of any other molecular substance. When we relate molecules to molar mass, 1 molar mass is equivalent to 1 mol, or 6.022 X 10 molecules. 

Figure 7. Maximum tolerable bromine content (X2) for miscibility of 50/50 (w/w) mixtures of poly(styrene) and partially brominated poly(styrene) as a function of the molar mass of the primary homopolymer. Dashed curve description by Scott s eq. (11) with = 0.118 drawn curve description with either eq. (15) (spinodal analysis, = 0.327) or eqs (3) (binodal analysis, g = 0.324). Data by Kambour et...

Perform the calculations necessary to demonstrate that bromine is indeed the limiting reagent (Sec. 1.6). The densities and molar mass needed to complete the calculations can be found in the abbreviated MSDSs on the website or various handbooks of chemistry. 

Iodine monochloride, l-CI has a very similar molar mass to bromine, Br2, but has a higher boiling point, Explain,... 

A compound of molar mass 177 g/mol contains only carbon, hydrogen, bromine, and oxygen. Analysis reveals that the compound contains 8 times as much carbon as hydrogen by mass. Find the molecular formula. 

Compounds were quantified by comparing the computer calculated area for the brominated compound with the integrated response for a known amount of octachlo-ronaphthalene. Differences in ionization cross-section, which affect the sensitivity of the mass spectrometer to a given compound, were compensated for by determining the relative molar response (RMR) of authentic compounds to octachloronaphthalene. 

Three molar equivalents of bromine is added with cooling to a mixture of 1 molar equivalent of quinoline and 3 gram-atom equivalents of sulfur, and the resulting mixture is heated to 180-200" in an oil bath for 2 hours. The cooled reaction mass is extracted several times with hot concentrated hydrochloric acid, and the combined extracts are made alkaline with sodium hydroxide. Ether extraction of the alkaline mixture followed by distillation of the ethereal solution gives a 50% yield of 3-bromoquinoline boiling at 158—162°/24 mm. 

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