Ile waży:
a) 0,1 mola Zn
b) 5 moli H2SO4
c) 0,602*10^23 H2O
d) 30,1*10^23 NaOH
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a)n=0,1mol
Mzn=65g/mol
m=0,1*65=6,5g
b)n=5mol
MH2SO4=98g/mol
m=5*98=490g
c)n=0,602/6,02=0,1mol
MH20=18g/mol
m=0,1*18=1,8g
d)n=30,1/6,02=5mol
MNaOH=40g/mol
m=5*40=200g
a)MczZn=65g/mol
1mol - 65gZn
0,1mol - x
x=6,5 g
b)MczH2SO4=2g+32g+64g=98g?mol
1mol--98g
5mol-xg
x=490g
c) MczH2O=18g/mol
0,602 *10^23 : 6,02 *10^23 = 0,1
m=0,1*18=1,8g
d)mcz naoh=23+17=40g/mol
30,1 *10^23 : 6,02 *10^23 =5
5*40=200g