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Formula procentuala a NaNO3

Răspuns :

M NaNO3= 23+14+48=85
85 g NaNO3.........23 g Na.........14 g N..........48 g O
100 g NaNO3...........x ..................y...................z
x=100*23/85=.......% Na
y=100*14/85=........% N
z=100*48/85=.......% O