найдите массовую долю элемента Co2, CaS, CaCO3, NaNO3

Co3w(Co) = 3*59:117 = 0( CO3 w(C) = 1*59:107 =0,5514 w(O) = 3*16:107 =0, 4485)CaSw(Ca) = 1*40:72 = 0,5555 w(S) = 1*32:72 = 0,4444 CaCO3w(Ca) = 1*40:100 = 0, 4w(C) = 1*12:100 = 0,12w(O) = 3*16:100= 0,48NaNO3w(Na) = 1*23:85 = 0, 2705w(N) = 1*14:85 = 0,1647w(O) = 3*16:85 = 0,5647