M(N2)=n*M=N*M/N a =1*28/6,02*10(23)=4,65*10(-23)г.
m(2Xe)=N*M/N a=2*131/6,02*10(23)=43,5*10(-23)г.
a) CuO+2HCl=CuCl2+H2O
б)CuO+H2SO4=CuSO4+ H2O
в)Cu(OH)2+2HNO3=Cu(NO3)2+2H2O
г)CuO+2HBr=CaBr3+H2O
д)3КOH+H3PO4=K3PO4+3H2O
е)2KOH+H2SO3=K2SO3+2H2O
ж)АI2O3+6Hl=2All3+3H2O
з)2Аl(OH)3+3H2SO4=Al2(SO4)3+6H2O
2Li+H₂=2LiH
LiH+H₂O=LiOH+H₂↑
LiOH+HNO₃=LiNO₃+H₂O
4LiNO₃=t=<span>2Li</span>₂<span>O+4NO</span>₂↑<span>+O</span>₂↑