Chemistry: Which substance is reduced ? Cl^2 +2KBr= 2KCl + Br2

Which substance is reduced ? Cl^2 +2KBr= 2KCl + Br2

middlegirlrule9453

20.03.2021

Initially Br is in -1 oxidation state and Cl in 0 oxidation state. Finally Cl is in -1 o.s. and Br in 0.

This means that Br has oxidised from -1 to 0 and Cl is reduced from 0 to -1.

KBr is reducting agent as it helps Cl to reduce.

Cl2 is oxidising agent as it helps Br to oxidise.

Explanation:

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FailingstudentXD

20.03.2021

2 KBr is being reduced

Need Moderator help please. If anyone could delete all of my questions or report all of my questions that would be great.

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amelie1010

30.07.2021

Answer : The length of protein will be, 36.8 A⁰

Explanation :

First we have to calculate the amino acid residue.

$\text{Amino acid residue}=\frac{\text{Length of single strand of protein}}{\text{Mean residue mass}}$

Given:

Length of single strand of protein = 27.0 kDa

Mean residue mass = 110 Da

$\text{Amino acid residue}=\frac{27.0kDa}{110Da}=\frac{27000Da}{110Da}=245.4$

Now we have to calculate the number of turns in protein.

$\text{Number of turns in protein}=\frac{\text{Amino acid residue}}{3.6\text{amino acid per turn of the alpha-helix}}$

As there are 3.6 amino acid per turn of the alpha-helix.

$\text{Number of turns in protein}=\frac{245.4}{3.6}=68.17$

Now we have to calculate the length of the protein.

$\text{Length of protein}=\text{Number of turns in protein}\times \text{Length of each turn}$

As, we know that the length of each turn = 0.54 A⁰

$\text{Length of protein}=68.17turns\times 0.54\AA=36.8\AA$

Thus, the length of protein will be, 36.8 A⁰

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