Н2+Сl2=2HCl
H2+2K=2KH
H2+Al2O3 - нет такой реакции
HgO + H2 = Hg + H2O
H2+WO3=W+3H2O
2) 2HCl=H2+Cl2
H2 + S = H2S
O3 + H2S = SO2 + H2O
3) 8r xr
2H2+O2=2H2O
4r 36
x=(8*36)/4=72r
Вот, сделал как можно быстрее, все правильно, удачи в химии тебе)
Ответ:
Объяснение:
Mr(H2S) = 1*2 + 32 = 34
W(H) = Ar(H) *n / Mr(H2S) *100% = 1*2 / 34 *100% =6%
W(S) = Ar(S) *n / Mr(H2S) *100% = 32 *1 / 34 *100% = 94%
Mr(CS2) = 12 + 32*2 =76
W(C) = Ar(C) *n / Mr(CS2) *100% = 12*1 / 76 *100% =16%
W(S) = Ar(S) *n / Mr(CS2) *100% = 32*2 / 76 *100% = 84%
Mr(CaSO4) = 40 + 32+16*4 =136
W(Ca) = Ar(Ca) *n / Mr(CaSO4) *100% = 40*1 / 136 *100% =29%
W(S) = Ar(S) *n / Mr(CaSO4) *100% = 32*1 / 136 *100% = 23%
W(O) = Ar(O) *n / Mr(CaSO4) *100% = 16*4 / 136 *100% =48%
Mr(Na2SO4) = 23*2 + 32 + 16*4 =142
W(Na) = Ar(Na) *n / Mr(Na2SO4) *100% = 23*2 / 142 *100% =32%
W(S) = Ar(S) *n / Mr(Na2SO4) *100% = 32*1 / 142 *100% = 22%
W(O) = Ar(O) *n / Mr(Na2SO4) *100% = 16*4 / 142 *100% = 46%
Mr(Fe2(SO4)3 = 56*2 + 32*3 + 16*12 = 342
W(Fe) = Ar(Fe) *n / Mr(Fe2(SO4)3 *100% = 56*2 / 342 *100% =33%
W(S) = Ar(S) *n / Mr(Fe2(SO4)3 *100% = 32*3 / 342 *100% =28%
W(O) = Ar(O) *n / Mr(Fe2(SO4)3) *100% = 16*4 / 342 *100% = 39%
SiO2+K2O=K2SiO3
K2SiO3+2HCl=2KCl+H2SiO3
2K(+)+SiO3(2-)+2H(+)+2CL(-)=2K(+)+2Cl(-)+H2SIO3
2H(+)+SiO3(2-)=H2SiO3
H2SIO3=H2O+SiO2