October 2018 2 11 Report

1.Wartość pewnego pierwiastka chemicznego x wynosi 4 . Wzur tego pierwiastka ma wynosić.

a)XO

b)X2O

c)XO2

d)XO4

2. oblicz masy cząsteczkowe

a) Mco2o

b)Mal2 (SO4)3


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