1)2
2)1 6HNO3+S=H2SO4+6NO2+2H2O
3)<span>водный раствор сахарозы</span>
4)3
5)1,2
<span>Mr(H203) = H2 + O3= 1*2 + 16*3 = 2 + 48 = 50 </span>
1) V2O5 + 6HCl = 2VOCl2 + Cl2 + 3H2O, баланс:
2V+5 +2e- = 2V+4 | 2 | 2 | 1 |
2Cl- -2e- = Cl2 | 2 | | 1 |;
2) 3Pb + 8HNO3 = 3Pb(NO3)2 + 2NO + 4H2O, баланс:
Pb -2e- = Pb+2 | 2 | 6 | 3 |
N+5 +3e- = N+2 | 3 | | 2 |.
F = k/x
k = Fx
k = 120 Н / 0,02 м = 6000