1) 2Na + s = na2s
2na + 2 hci = 2 naci + h2
2ha + h20 = 2najh + h2
2na + h2 = 2 nah
2)caco3
caco3
ca3
3)ai203 + 6 hci = 2aici3
ai203 + 2naoh + 3h20 = 2na(ai(oh)4)
ai(oh)3 + hcl = aici3 + 3h20
ai(oh)3 + naon = na(ai(oh)4)
это всё
u = 1.66 * 10^-27 кг
Ar(As) = 75
Ar(Ge) = 73
m(As) = Ar(As) * u = 75 * 1.66 * 10^-27 = 124.5 * 10^-27 = 1.245 * 10^-25 кг
m(Ge) = Ar(Ge) * u = 73 * 1.66 * 10^-27 = 121.18 * 10^-27 = 1.2118 * 10^-25 кг
K₂O + H₂O = 2KOH
Na₂O + H₂O = 2NaOH
CaO + H₂O = Ca(OH)₂
BaO + H₂O = Ba(OH)₂
Ca + 2H₂O = Ca(OH)₂ + H₂↑
2K + 2H₂O = 2KOH + H₂↑
2Na + 2H₂O = 2NaOH + H₂↑
Ba + 2H₂O = Ba(OH)₂ + H₂↑
Η(CuO)\η(H2)=1|1
η(H2)=30 моль
m(h2)=30г
V(H2)=22,4*30=672 л
CH4 = C + 2H2
C + O2 = CO2
Mg2O + CO2 = Mg(CO3)2