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3 years ago

Help it’s due at a certain time

Chemistry

1 answer:

DiKsa [7]3 years ago

3 0

Answer:

Explanation:

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Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el

Alexxandr [17]

Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

$Ni^{2+}+2e^-\rightarrow Ni$

$96500\times 2=193000Coloumb$ of electricity deposits 1 mole of Nickel

1 mole of Nickel weighs = 58.7 g

Given quantity = 18.0 kg = 18000 g (1kg=1000g)

58.7 g of Nickel is deposited by 193000 C of electricity

18000 g of Nickel is deposited by = $\frac{193000}{58.7}\times 18000=59182282.8C$ of electricity

$Q=I\times t$

where Q= quantity of electricity in coloumbs = 59182282.8C

I = current in amperes = 31.0 A

t= time in seconds = ?

$59182282.8C=31.0A\times t$

$t=1909105.9sec$

(1h=3600 sec)

$t=530hours$

Thus 530 hours are required to plate 18.0 kg of nickel onto the cathode if the current passed through the cell is held constant at 31.0 A

3 0

3 years ago

PLEASE ANSWER

Vikki [24]

D) refracted
because , the light changes direction.. causing the penny to look bigger than it is.

4 0

3 years ago

Cell is to a tissue as brick is to _______.<br> Cement<br> Clay<br> Bricklayer<br> wall

svet-max [94.6K]

Answer:

bricklayer

Explanation:

is the correct answer

6 0

3 years ago

You find small pieces of ice instead of ice cubes in the freezer. State how this is possible.

Nat2105 [25]

Well, if u had a spilled liquid in there (we'll simply go with water) and you had the freezer at a cold temperature it would change (like,icycles on trees when it's snowing)

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3 years ago

HELP PLS (CHEMISTRY)

IRINA_888 [86]

The first most obvious thing to note is when naming transitional metals, you have to state its charge with roman numerals (except for 1 if I remember correctly). For example, Iron (lll), iron has a charge of 3.

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3 years ago