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GenaCL600 [577]

3 years ago

15

Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers unselected.

2 answers:

melomori [17]3 years ago

7 0

Answer:The final products of fission and fusion are elements that are different than the original ,

Fission occurs mostly with elements heavier than lead on the periodic table

Explanation:

ICE Princess25 [194]3 years ago

3 0

Correct answers:
<span>Nuclear fission and fusion both affect the nucleus of an atom.

</span><span>The final products of fission and fusion are elements that are different than the original.

</span><span>Fission occurs mostly with elements heavier than lead on the periodic table.</span>

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calcium is obtained industrially by electrolysis of molten cacl2 and is used in aluminum alloys. how many coulombs are needed to

Vinvika [58]

It takes 107 minutes 22 seconds and 96500 coulombs of charge produce 20.2 g of calcium.

The balanced equation for the reaction is,

$CaCl _{2} \:→ \: Ca ^{ 2 + } + 2Cl {}^{ - }$

The half-reaction of calcium is,

$Ca ^{2 + } + 2e ^{ - } → \: Ca$

Mass of calcium = 20.2 g

The molecular mass of calcium = 40 u.

The number of moles calcium are,

$Number \: of \: moles = \frac{mass}{molecular \: mass}$

$= \frac{20.2}{40}$

$= 0.5 \: moles$

One mole of Calcium is produced by 2 moles of electrons.

So, 0.5 moles of Calcium produce,

$= 0.5 \times 2$

$= 1 \: mole \: of \: electron$

The charge required to produce 202 g of calcium is,

$= 1 \:F$

$= 1 \times 96500 \: C$

$= 96500 \: C$

Current = 15 A

The time taken to produce 20.2 g of calcium is,

$I = \frac{Q}{T}$

$T = \frac{96500}{15}$

$= 6433.3 \: s$

$= 107 \: minutes \: 22 \: seconds$

Therefore, 96500 columns of charge are required to produce 20.2 grams of calcium. And it takes 107 minutes and 22 seconds.

To know more about charge, refer to the below link:

brainly.com/question/14713274

#SPJ4

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1 year ago