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inysia [295]
3 years ago
14

What is the valency of Al2O3 and why?

Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
7 0
The valency of Al₂O₃ is 0 because each element in the compound has its outer most shell completely filled so it cannot obtain electrons of donate them since it is in its stable-most form.
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How to use molar mass
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Explanation:

the molar mass of a compound can be caucaleted by adding the standar atomic masses.

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One success of Johann Döbereiner's law of triads was that it organized most of the known elements into three-element groups base
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Aluminum reacts with iron nitrate to form aluminum nitrate and iron. What is the
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In a solution the solute is the substance present in the greatest amount true or false
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Solute is something that is being dissolved { ex : sugar , salt} 

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3 years ago
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You perform a distillation to separate a mixture of propylbenzene and cyclohexane, and you obtain 2.9949 grams of cyclohexane (d
Romashka-Z-Leto [24]

Answer:

66.67%

Explanation:

From the given information:

mass of cyclohexane = 2.9949 grams

density of cyclohexane = 0.779 g/mL

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Density = mass/volume

∴

Volume = mass/density

So, the volume of cyclohexane = 2.9949 g/ 0.779 g/mL

= 3.8445 mL

Also,

mass of propylbenzene = 1.6575 grams

density of propylbenzene = 0.862 g/mL

Volume of propylbenzene =  1.6575 g/ 0.862 g/mL

= 1.9229 mL

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= (\dfrac{v_{cyclohexane}}{v_{cyclohexane}+v_{propylbenzene}})\times 100

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= (\dfrac{3.8445}{5.7674})\times 100

= 66.67%

6 0
3 years ago
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