a) n P=46,5/31=1,5(mol)
4P+5O2-->2P2O5
1,5---1,875
m O2=1,875.32=60(g)
b) n C=30/12=2,5(g)
C+O2--->CO2
2,5--2,5
m O2=2,5.32=80(g)
c) m Al=67,5/27=2,5(mol)
4Al+3O2--->2Al2O3
2,5----1,875(mol)
m O2=0,1875.32=60(g)
d) n H2=33,6/22,4=1,5(mol)
2H2+O2-->2H2O
1,5-----0,75(mol)
m O2=0,75.32=24(g)
Chúc bạn học tốt :))
a)
nP= 46,5/31 = 1,5(mol)
4P + 5O2 --> 2P2O5
m O2=1,875.32=60(g)
b)
nC= 30/12 = 2,5(mol)
C + O2 -->CO2
mO2=2,5.32= 80 (g)
c)
nAl= 67,5/27=2,5 (mol)
4Al + 3O2 --> 2Al2O3
mO2= 0,1875.32 =60 (g)
d) nH2=33,6/22,4=1,5(mol)
2H2 + O2 --> 2H2O
mO2=0,75.32=24(g)