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mCO2=44u
2CO + O2 ---> 2CO2
44,8dm3 CO ------ 88g CO2
xdm3 CO ----------- 7g CO2
x = 3,56dm3 CO
Zad 2)
MNaOH=40g/mol
mNaOH=10g
n=m/M
n=10/40
n=0,25mola
n=0,25mola
v=0,2dm3
Cm=n/v
Cm=0,25/0,2
Cm = 1,25mol/dm3
Zad 3)
150cm3 1,2M ....................... 2-x
.................................xM
250cm3 2,0M ....................... x-1,2
150/250 = 2-x/x-1,2
150(x-1,2) = 250(2-x)
150x-180 = 500-250x
400x = 680
x = 1,7mol/dm3