Question

Дано Fe 2 O 3 найти w (Fe) , w (O)

Answer 1

W(Fe) = $frac{2M(Fe)}{M(Fe2O3)} = frac{2*56}{2*56*16*3} = 0,7 = 70%$
W(O₂) = $frac{3M(O)}{M(Fe2O3)} = frac{16*3}{2*56*16*3} = 0,3 = 30%$