Chemists have not created a periodic table of compounds
Explain the reason behind that the chemists have not created a periodic table of compounds?
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One main reason I can think of, that they haven’t been addressed yet, is a periodicity of elements. We can line elements up into neat functional groups--, transition elements, alkali metals, halogens etc. This we cannot do with the compounds, even if we had an isolated table for hydrocarbons, one for dyestuffs, and one for elastomers... Compounds also find extensive use as smaller blocks of larger compounds. We call these as precursors. Toluene is a very toxic compound, but if we compound it into the toluene diisocyanate, then compound that into polyurethane, becomes safe enough that we can build it into replacement hip joints. Chemists keep books of compounds, but the table on a big sheet of paper size of...ohh, entire side of a Wal-Mart store could be big enough? It could not ever happen.
Normal butane (C4H10) is stored as a compressed liquid at 90°C and 1400 kPa. In order to use the butane in a low-pressure gas-phase process, it is throttled to 150 kPa and passed through a vaporizer. The butane emerges from the vaporizer as a
Transference numbers and molar conductors can be used to calculate ionic mobilities. This tables under is giving the transference numbers for positive ions at 25 degree C and the values obtained by extrapolation to infinite dilution: Q : Neutralisation of phosphorous acids Provide solution of this question. To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3 PO3) the volume of 0.1 M aqueous KOH solution required is: (a) 40 mL (b) 20 mL (c) 10 mL (d) 60 mL
Provide solution of this question. To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3 PO3) the volume of 0.1 M aqueous KOH solution required is: (a) 40 mL (b) 20 mL (c) 10 mL (d) 60 mL
The surface between a liquid and a vapour distinguishes these fluids. The surface tension of liquids can be looked upon as that the property which draws a liquid together and forms a liquid vapour interface, therefore, distinguishing liquids from gases.<
Catalyst is a substance which accelerates the rate of a chemical reaction without undergoing any change in its chemical composition or mass during the reaction. The phenomenon of increasing the rate of a reaction with the help of a catalyst is known as catalysis.
At low temperatures, mixtures of water and methane can form a hydrate (i.e. a solid containing trapped methane). Hydrates are potentially a very large source of underground trapped methane in the pole regions but are a nuisance when they form in pipelines and block th
To meet human needs, scientists have started preparing synthetic rubbers. Besides having similar properties as natural rubbers they are tougher, more flexible and more durable than natural rubber. They are capable of getting stretched to twice its length. Though, it reverts to its original shape
These types of polymers are formed as a result of condensation reaction between monomer units. Some common examples are being discussed here: 1. Polyesters Q : Analytical chemistry 37% weight of HCl 37% weight of HCl and density is 1.1g/ml. find molarity of HCl
37% weight of HCl and density is 1.1g/ml. find molarity of HCl
What is the basic difference among hcl gas and hcl acid? Briefly state the difference?
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