Question

calculate the percentage composition of each element in potassium chlorate ,KClO3.​

Answer 1

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Explanation:

Relative molecular mass of KClO3

= 39.09 + 35.5 + (3 x 16)

= 122.59 g

So, 122.59 g of KClO3 contains 39.09 g of K

Hence, 100 g of KClO3 contains

= (100 x 39.09)/122.59

= 31.9 g

Also, 122.59 g of KClO3 contains 35.5 g of Cl

Hence, 100 g of KClO3 contains

= (100 x 35.5)/122.59

= 28.9 g

And, 122.59 g of KClO3 contains 48 g of O

Hence, 100 g of KClO3 contains

= (100 x 48)/122.59

= 39.1 g

Therefore, the percentage composition of K, Cl and O in KClO3 are 31.9%, 28.9% and 39.1% respectively.

Answer 2

Answer:

The percentage composition of $K,Cl$ and $O$ in $KclO_{3}$ are $31.9$%, $28.9$% and $39.1$% respectively.

Explanation:

The relative molecular mass of $KClO_{3}$ :

$=39.09+35.5+(3*16)\\=122.59g$

$122.59g$ of $KClO_{3}$ contains $39.09g$ of $K$

Hence, $100g$ of $KclO_{3}$ will contain

$\frac{100*39.09}{122.59}$$=31.9g$ of $K$

$122.59g$ of $KClO_{3}$ contains $35.5g$ of $Cl$

Hence, $100g$ of $KclO_{3}$ will contain

$\frac{100*35.5}{122.59} =28.9g$ of $Cl$

$122.59g$ of $KClO_{3}$ contains $48g$ of $O$

Hence, $100g$ of $KClO_{3}$ will contain

$\frac{100*48}{122.59}=39.1g$ of $O$

Hence the percentage composition of $K,Cl,O$ in $KClO_{3}$ are $31.9$%, $28.9$% and $39.1$% respectively.