I2 + Na2S2O3 → NaI + Na2S4O6 Balance the equation, if necessary.
2 answers:
Answer : The balanced chemical reaction will be,
Explanation :
Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.
The given unbalanced chemical reaction is,
This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of iodine, sulfur and oxygen are not balanced.
In order to balanced the chemical reaction, the coefficient 2 is put before the and
.
Thus, the balanced chemical reaction will be,
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Given :
Initial mass , a = 150 gm .
Half time ,
.
Final mass , x = 18.75 gm .
To Find :
The time taken to decay 18.75 gm .
Solution :
We know , time taken is given by :
Here , k is a constant given by :
Putting all given value in above equation :
We get :
Therefore , time taken is 6.94 hours .
Hence , this is the required solution .