Нужно только буква а,пожалуйста СРОЧНО!)

Ответ:

M(N2O) = 2*14+16 = 44

W(N) = 2*14/44 = 0.64=64%

W(O) = 16/44 = 0.36 = 36%

M(NO) = 14+16 = 30

W(N) = 14/30 = 0.47= 47%

W(O) = 16/30 = 0.53 = 53%

M(N2O3) = 2*14+3*16 = 76

W(N) = 2*14/76 = 0.37= 37 %

W(O) = 3*16/76 = 0.63 = 63%

M(N2O4) = 2*14+4*16 = 92

W(N) = 2*14/92 = 0.30= 30%

W(O) = 64/92 = 0.70 = 70%

M(N2O5) = 2*14+5*16 = 108

W(N) = 2*14/108 = 0.26 = 26%

W(O) = 5*16/108 = 0.74 = 74%

Объяснение: