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angoraspinner

Element     Symbol      Mass Percent

Nitrogen          N                   13.854%

Oxygen          O                   47.474%

Potassium        K                   38.672%

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ujalakhan18

Answer:

38.6%

Explanation:

Molar mass of KNO3 is

=39+14+(16*3)

=53+48

=101 g/mol

Now

Percentage composition of potassium in KNO3 is=(atomic mass of K*no. of atoms)/molar mass of KNO3 *100%

%age composition of K= (39*1)/101 *100%

=0.386*100%

=38.6%

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