Answered

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Potassium nitrate, bKNO3 , is 38.7% potassium by mass. If you have 300 grams of KNO; how many grams of potassium can you extract from it?

Sagot :

ardni313

Mass of Potassium : 116.1 g

Further explanation

Given

38.7% potassium in Potassium nitrate

300 g of KNO3

Required

mass of potassium

Solution

%mass of element = (mass of an element in 1 mole of compound/mass of 1 mole compound) x 100%

mass of K(potassium) in 300 g KNO3 :

= 38.7% x 300 g

= 116.1 g

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