Amixture of kcl and kno3 is 44.20% potassium by mass. the percent of kcl in the mixture is closest to a) 40% b) 50% c) 60% d) 70% e) 80%

The correct answer is option (a).

Explanation:

Suppose we have total mass of the mixture be 100 g

let the mass of KCl be x

let the mass of be y

x + y = 100...(1)

Moles of KCl =

Moles of K in KCl will be = (1 mol is present in 1 mole of molecule)

Moles of

Moles of K in will be = (1 mol is present in 1 mole of molecule)

Percentage of potassium in the mixture = 44.20 %

In 100 g, the mass of potassium = 44.20 g

Moles of potassium =

So,

..(2)

Solving equation (1) and (2):

we get ,y = 63.78 g, x=36.22 g

Percentage of KCl:

The percent of KCl in the  mixture is closest to 40%.Hence ,option (a) is correct.

i believe the answer is a.

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