Balon o pojemności 50 cm`3` napełon iono helem . Oblicz mase helu w balonie gęstośC helu w temp. 25`C wynosi 0,154 g/dm`3`
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V= 50 cm3
d= 0.154g/cm3
d=m/v ==> m=d*v
m= 0.154*50= 7.7g Helu