Stehiometrija

Submitted by JovanaDj on Wed, 04/23/2014 - 16:43
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Koliko se grama CaO dobija iz 4g Ca i 1.6g O2?

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milicaradenkovic - Wed, 04/23/2014 - 17:15

2Ca+O2------------------->2CaO

n(O2)=m/Mr=1.6/32=0.05 mol

n(Ca)=m/Mr=4/40=0.1 mol posto nemas nista u visku onda je 

n(CaO)=n(O2)*2=0.05*2=0.1 mol

m(CaO)=n(CaO)*Mr=0.1*56=5.6 g

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JovanaDj - Wed, 04/23/2014 - 17:25

Hvala ti puno! :))