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A lead glass is prepared by melting 20.0 g of silica sio2 and 80.0 g of leadii oxide pbo what is the mole fraction of sio2 in the glass?
Wiki User
∙ 14y ago
48.15 Mole% Silica and 51.86 Mole% Lead Oxide. 20% Silica - Molecular weight 60.1 = 60.1*0.2 => 0.3332779 80% Lead Oxide - Mol Wt 223.2 = 223.2*80 => 0.358 Sum of mole wt -- 0.6912 Mole % Silica = 0.332/0.6912 = 48.14 Mole% -- Balance Lead Oxie...
Wiki User
∙ 14y ago
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How can reduce silica sand melting temperature?
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How is it possible for magma to have a higher silica content than the rock from which it formed?
Magma could have higher silica content than its parent rock, if during melting or movement it is gets in contact with silicic country rocks and absorbs them. This is reffered to as Assimillation.
What substance has higher melting point silicon dioxide or methanol?
Silicon dioxide. Silicon dioxide silica is the mineral quartz and is a giant molecule with a melting point of over 16000C. Methanol is a molecular compound (an alcohol) with a melting point of -980C
At what temperature does sand turn into glass?
Quartz (SiO2), the main mineral in silica sand, has a melting temperature of 4,200 degrees Fahrenheit, or 2,300 degrees C.
What is silicon made out of?
Silica gel is a granular, vitreous, highly porous form of silica and is made synthetically from sodium silicate.
What is glass and how it is made?
Glass is silica dioxide. It is made by melting silica sand.
What is the melting point of silica crucibile?
The melting point of silicon dioxide is in the range 1 600-1 725 0C.
Why does alkalic basalt contain less silica than tholeiites?
The magma that forms alkalic basalt forms under conditions with a higher fraction of partial melting that the magma that forms tholeiitic basalt. This means that the resulting alkalic melt contains a higher percentage of the minerals with a low silica content.
How can reduce silica sand melting temperature?
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How can you melt fused silica?
Fused silica has 2 meanings: previously fused silica and presently fused silica. Previously fused silica is fused by heating it to its melting point. This can be done in crucible in a furnace. Presently fused silica is already hot and fused. Note: melted silica is probably a conductor, at least melted glass is a conductor.
Are All glasses elements?
C Glass is made of silica which is an element, but I'm sure there is more involved in the production of glasses than simply melting silica.
Why silica has a high melting point?
Silica is like Carbon, Basically its atoms form strong covalent bonds between each other(4 as they each have 4 electrons in their outer shell) these bonds are branched in a never ending pattern, many of these strong bonds have to be broken in order for Silica to melt and hence it has a high melting point
How is material prepared for homeopathic remedies?
For homeopathic remedies, the remedy material is finely ground and then prepared by extensive dilutions. In the early days of homeopathy, silica was prepared from powered rock.
What are the processes use to make glass?
Essentially glass is obtained by the melting of mixture silica sand - sodium carbonate.
What processes are used to make glass?
Essentially glass is obtained by the melting of mixture silica sand - sodium carbonate.
What percentages of silica soda and lime make glass?
A typical glass is prepared from 75 % SiO2 and 25 % Na2CO3.
How does the coposition of the magma affect the temperature at which it solidifies?
The composition of the magma is very important for solidificatoin temperature. When it starts to cool, crystals of minerals begin to grow. If it has a low silica content - which means high melting point - the magma will solidify at high temeratures. If it has a high silica content - which means low melting point - it will solidify at lower temperatures.
