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2 years ago

Help please fast will mark as Brainliest

Chemistry

2 answers:

goblinko [34]2 years ago

6 0

Answer:

Zn + I2 > Zn+² + 2 I-

Explanation:

First identify the which is oxidised and reduced in the reaction.

Zn > Zn2+ is oxidised increase in ox. #

I2 > 2I- is reduced decrease in ox. #

Do half reactions and add electrons to each positive side to balance the charges

Zn > Zn2+ + 2e-

I2 + 2e- > 2 I-

Combine each product side and reactant. Cancel the electrons out since they are in the same amount.

wlad13 [49]2 years ago

3 0

Answer:

The answer is 2i on right hand side.

Explanation:

We should star by checking the equation from right.

First we check how many Zn r there in left hand side. Which is 1. Let us check how many Znr there in right hand side, there is 1.So Zn is balanced, and don't worry about Znplus2 on right hand side it is just the ions not how many zinc r there.

Now let us check how many I are there left hand side. Which is 2. Now how many I are there in right hand side? Only 1.

So we put 2 behind I.

Now there r 2 I on both sides.

Its simple actually.

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Answer:

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2 years ago

If you have a solution that contains 46.85 g of codeine, C18H21NO3, in 125.5 g of ethanol, C2H5OH, what is the mole fraction of

irakobra [83]

Answer:

0.22

Explanation:

Given, Mass of $C_{18}H_{21}NO_3$ = 46.85 g

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The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{46.85\ g}{299.4\ g/mol}$

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The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{125.5\ g}{46.07\ g/mol}$

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So, according to definition of mole fraction:

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