Oblicz stosunek masowy chlorku sodu
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Na:Cl=23:35.5=1:1.52
masa molowa NaCl=23+35.5=58.5
stosunek masowy sodu w całym chlorku sodu (23/58.5)*100%=39.3%
stosunek masowy chloru w całym chlorku sodu (35.5/58.5)*100%=60.7%