Oblicz ile moli stanowi 500g tlenku wapnia.

M CaO=56g/mol 1mol CaO ---- 56g xmoli CaO ---- 500g x = 8,93mola

[latex]M_{CaO}= 56frac{g}{mol}[/latex]   1mol-- 56g x-- 500g   x= 8,9mol