Найди массовую долю

Массовые доли элементов:

• NaNO₃, \(M=85\):
  \(\omega(\text{Na})=\frac{23}{85}=27{,}1\%\)
  \(\omega(\text{N})=\frac{14}{85}=16{,}5\%\)
  \(\omega(\text{O})=\frac{48}{85}=56{,}5\%\)

• H₃PO₄, \(M=98\):
  \(\omega(\text{H})=\frac{3}{98}=3{,}1\%\)
  \(\omega(\text{P})=\frac{31}{98}=31{,}6\%\)
  \(\omega(\text{O})=\frac{64}{98}=65{,}3\%\)

• AlCl₃, \(M=133{,}5\):
  \(\omega(\text{Al})=\frac{27}{133{,}5}=20{,}2\%\)
  \(\omega(\text{Cl})=\frac{106{,}5}{133{,}5}=79{,}8\%\)