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![[Post New]](/templates/default/images/icon_minipost_new.gif) 12 May 2008 13:00:42 IST
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Lapis Lazuli is a blue coloured mineral used as valuable artificial gemstone it is :
dipole moment of CO is very small (0.1 D) (inspite of d large difference in electro negativity btw C&O ) & negativ end of d dipole lies near d less electro negativ C-atom it is due to :
tell d ans
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14 May 2008 09:36:39 IST
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LAPIS LAZULI IS A SEMI -PRESIOUS STONE . ITS USES R : IT TAKES AN EXCELLENT POLISH & CAN BE MADE IN TO JEWELLERY CARVINGS etc. IN ARCHITECTURE FOR CLADDING WALLS .
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14 May 2008 11:01:49 IST
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naa angel its actually asked about its formula & not its uses anyway tanx for ur ans & can u ans for d oder quesn 2ooooooooo
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its time fr u to achive d goal wake up donot hesitate to do hard work |
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14 May 2008 23:54:41 IST
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i'm not exactly sure bout the answer...
but lapis lazuli is a semi precious stone that is prepared from ultramarine,which has the formula: Na8{Al6Si6O24}S2
:i'm really sorry bout the dismal representation...editor nt functioning....all numbers are in subscript.
the second ans:
it is due to backbonding taking place in the CO molecule from O to C
that reduces the dipole moment of the compound.
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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15 May 2008 00:00:34 IST
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its formula is ( Na , Ca)8 ( AlSiO4 )6 ( S , SO4 , Cl ) 1-2
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15 May 2008 00:03:38 IST
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2) Formal charge and electronegative difference cancel each other
The reason for this, despite oxygen's greater electronegativity, is that the highest occupied molecular orbital has an energy much closer to that of carbon's p orbitals, meaning that greater electron density is found near the carbon.
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