Zad 1
M CO2=44g/mol
v=22,4dm3/mol
d=M/v
d=44/22,4
d = 1,96g/dm3
Zad 2
1mol H2O ----- 1mol tlenu
7moli H2O ------ xmoli tlenu
x = 7moli tlenu
1mol H2O2 ---- 2mole tlenu
4mole H2O2 ----- xmoli tlenu
x = 8moli tlenu
Odp. NIE
Zad 3
mAl2S3=150u
150g Al2S3 ------ 3mole siarki
75g Al2S3 -------- xmoli siarki
x = 1,5mola siarki
Zad 4
mCu=64umCu2O=144umCuO=80u144g Cu2O-----128g Cu5g Cu2O----------xg Cux = 4,44g Cu80g CuO-----64g Cu5g CuO--------xg Cux = 4g CuOdp. NIE
Zad 5
mNaOH=23u+16u+1u=40u 40g NaOH--------23g sodu 20g NaOH--------xg sodu x=20*23/40 x=11,5g sodu mNa2O=2*23u+16u=62u 62g tlenku-------46g sodu xg tlenku---------11,5g sodu x=62*11,5/46x = 15,5g tlenku sodu
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Zad 1
M CO2=44g/mol
v=22,4dm3/mol
d=M/v
d=44/22,4
d = 1,96g/dm3
Zad 2
1mol H2O ----- 1mol tlenu
7moli H2O ------ xmoli tlenu
x = 7moli tlenu
1mol H2O2 ---- 2mole tlenu
4mole H2O2 ----- xmoli tlenu
x = 8moli tlenu
Odp. NIE
Zad 3
mAl2S3=150u
150g Al2S3 ------ 3mole siarki
75g Al2S3 -------- xmoli siarki
x = 1,5mola siarki
Zad 4
mCu=64u
mCu2O=144u
mCuO=80u
144g Cu2O-----128g Cu
5g Cu2O----------xg Cu
x = 4,44g Cu
80g CuO-----64g Cu
5g CuO--------xg Cu
x = 4g Cu
Odp. NIE
Zad 5
mNaOH=23u+16u+1u=40u
40g NaOH--------23g sodu
20g NaOH--------xg sodu
x=20*23/40
x=11,5g sodu
mNa2O=2*23u+16u=62u
62g tlenku-------46g sodu
xg tlenku---------11,5g sodu
x=62*11,5/46
x = 15,5g tlenku sodu