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Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B2O3, 4.5-6% Na2O and 2-5% Al2O3. Sometimes Zno may be added to improve the properties. Its two outstanding proper is are high chemical resistance and low coefficient of thermal expansion which make it most suitable for laboratory and medical ware, oven and table ware and industries glass ware. Borosilicate glass may contain a small quantity of fluorine which is used to lower the viscosity. Calcium phosphate may also be included in borosilicate composition to produce optimization during forming of the glass. Pyrex is an example of such glasses known for their low coefficient of expansion. These can be made by fusing a mixture of sand, lime, borax and alkali metal carbonates.
What kind of relation is there between them and the force constants of vibration that you have calculated? The enthalpies of vaporization of carbon and silicon are 717 kJmol -1
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Alkyl halide on reaction with dry silver oxide
Consult the inside front cover of the text for a list of common functional groups. (a) nitrile (b) ether
ALKALI AND ALKALINE EARTH METALS FORM ONLY 1+ AND 2+ IONS RESPECTIVELY.EXPLAIN
A red flame is produced when LiCl is heated. How can I determine which transition between the energy levels produces this colour?
LITHIUM AND BERYLLIUM MARKEDLY DIFFERENT FROM OTHER MEMBERS OF THEIR RESPECTIVE GROUP?.
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What are molecular orbitals? How are they formed? What does molecular orbital theory states? what is the significance of molecular orbital theory? Ans) Molecular orbitals are for
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