Question

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?

Answer 1

You can extract 116.1 grams of potassium from 300 grams of KNO3.

Step-by-step explanation:

To find the grams of potassium that can be extracted from 300 grams of KNO3, we first need to determine the mass of potassium in the compound. Since potassium nitrate is 38.7% potassium by mass, we can calculate the mass of potassium by multiplying the mass of KNO3 by 38.7%. This gives us 300 grams * 38.7% = 116.1 grams of potassium. Therefore, you can extract 116.1 grams of potassium from the 300 grams of KNO3.

Answer 2

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