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stiv31 [10]
2 years ago
7

Aluminium extraction from its ore​

Chemistry
1 answer:
klasskru [66]2 years ago
8 0
Aluminium ore is called bauxite. The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted.

The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it. Aluminium oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. Aluminium oxide does not dissolve in water, but it does dissolve in molten cryolite. This is an aluminium compound with a lower melting point than aluminium oxide. The use of cryolite reduces some of the energy costs involved in extracting aluminium.
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igor_vitrenko [27]

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3 years ago
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Open spaces in water's solid structure makes its solid state less dense than its liquid state.

Explanation:

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If Maria winks exactly 5 times every minute and she sleeps
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First, we need to find the amount of winks in an hour, to simplify it so we can answer easier. Since there are 60 minutes in an hour, we can multiply 5 by 60 to find the number of winks in an hour.

5*60=300

Now multiply 300 by 8.

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Hope this helps!

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