1.
а) 2Zn + O2 = 2ZnO
б) 2B + N2 =2BN
в) SI + 2H2 =SiH4
г) 2Al + 3Br2 = 2AlBr3
г) 2N2 + 5O2 = 2N2O5
д) B2O3 + 3H2O = 2B(OH)3
2. w(N2)= 28/108= 0,26*100%=26%
w(O5)= 80/108= 0.74*100%=74%
3. w(H2)= 2/82=0,02*100%=2%
w(SO3) = 80/82= 0,98*100%=98%
4. w(C2) =24/60=0,4*100%=40%
w(H4) =4/60=0,07*100%=7%
w(O2) =32/60=0,53*100%=53%
1.
а) 2Zn + O2 = 2ZnO
б) 2B + N2 =2BN
в) SI + 2H2 =SiH4
г) 2Al + 3Br2 = 2AlBr3
г) 2N2 + 5O2 = 2N2O5
д) B2O3 + 3H2O = 2B(OH)3
2. w(N2)= 28/108= 0,26*100%=26%
w(O5)= 80/108= 0.74*100%=74%
3. w(H2)= 2/82=0,02*100%=2%
w(SO3) = 80/82= 0,98*100%=98%
4. w(C2) =24/60=0,4*100%=40%
w(H4) =4/60=0,07*100%=7%
w(O2) =32/60=0,53*100%=53%