1. 2KBr + Cl2 = 2KBr + Br2
2. Br2 + H2 = 2HBr
3. HBr + NaOH = NaOH + H2O
4. NaBr + AgNO3 =
NaNO3 + AgBr⬇
1. Са + 2H2O = Ca(OH)2⬇
+ H2⬆
2. Ca(OH)2 + CO2 =
CaCO3⬇ + H2O
3. CaCO3 + H2CO3(CO2 +
H2O) = Ca(HCO3)2
..................................................................................
Ω(Br)=89,99%
M(Me)-?
ω(Me)=100-89,99=10,01%
x : y = 89,99/80 : 10,01/z
z=(80*10,01)/89,99=9
Ответ: M(Ме)=9
Металл - Бериллий.