W(N) = Ar(N) * n / Mr(C5H11O2N) = 23 * 1 / 117 *100% = 19,6%
W(C) = Ar(C)* n / Mr(C5H11O2N) = 12 * 5 / 117 *100% = 51,3%
W(H) = Ar(H) * n / Mr(C5H11O2N) = 1 *11 / 117 *100% = 9,4%
W(O) = Ar(O) * n / Mr(C5H11O2N) = 16 * 2 / 117 * 100% = 27,3%
