Mr(KNO3) = 101
W(K) = Ar(K) *n / Mr(KNO3) *100% = 39 * 1 / 101 *100% = 38,6%
W(N) = Ar(N) * n / Mr(KNO3) * 100% = 14 * 1 / 101 *100% = 13,9%
W(O) = Ar(O) * n / Mr(KNO3) *100% = 16 * 3 / 101 *100% = 47,5 %
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Mr(KNO3) = 101
W(K) = Ar(K) *n / Mr(KNO3) *100% = 39 * 1 / 101 *100% = 38,6%
W(N) = Ar(N) * n / Mr(KNO3) * 100% = 14 * 1 / 101 *100% = 13,9%
W(O) = Ar(O) * n / Mr(KNO3) *100% = 16 * 3 / 101 *100% = 47,5 %