1.ile gram siarczku glinu znajduje sie w 700cm3 roztworu 15% o gestosci 1,3g/cm3
2.Ile dm3 wodoru w warunkach normalnych potrzeba do otrzymania 6 moli wody
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zad.1
Cp=15%
mr=700cm³*1,3g/cm³=910g
ms=?
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:100%
ms=Cp*mr/100%
ms=15%*910g/100%
ms=136,5g
zad.2
22,4dm³-----1 mol
xdm³---------6 mol
x=22,4dm³*6mol/1mol
x=134,4dm³
1)
v=700cm3
d=1,3g/cm3
m=?
m=700*1,3
m = 910g
Z def. stęż. procent.
15g Al2S3-----100g roztworu
xg Al2S3-------910g roztworu
x = 136,5g Al2S3
2)
2H2 + O2---->2H2O
2*22,4dm3 H2------2mole H2O
xdm3 H2------------6mole H2O
x = 134,4dm3 H2