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Mg+2HCl=MgCL2+H2
z proporcji:
x(g)Mg-44,8dm3(H2)
24gMg-22,4dm3
x=24*44,8dm3/22,4dm3=48gMg
3.
2H2+O2=2H2O
2mole H2-36gH2O
x(moli)-36g
x=2mole wodoru
1mole O2-36gH2O
x(moli)-36g
x=1mol tlenu
2*6,02*10-23cząsteczekH2-36gH2O
x(cząsteczek)- 36g
x=12,04*10-23cząsteczek wodoru
1*6,02*10-23cząsteczekO2-36gH2O
x(cząsteczek)- 36g
x=6,023*10-23cząsteczek tlenu
2*22.4dm3 H2-36gH2O
x(dm3)-36g
x=44,8dm3wodoru
1*22.4dm3 O2-36gH2O
x(dm3)-36g
x=22,4dm3tlenu
4gH2-36gH2O
x(g)-36g
x=4g wodoru
32gO2-36gH2O
x(g)-36g
x=32g tlenu
4. CuO+H2=Cu+H2O
x(dm3)wodoru-1,28gCu
22,4dm3-64gCu
x=22,4dm3*1,28g/64g
x=0,448dm3 wodoru
2
C+O2=CO2
2000g C- x(dm3)tlenu
12g-22,4dm3
x=3733dm3tlenu
3733dm3-21%
x-100%
x=100*3733/21
x=