дано
m(Zn) = 19.5 g
m(ZnS)-?
Zn+H2S-->ZnS+H2
M(Zn) = 65 g/mol
n(Zn) = m/M = 19.5 / 65 = 0.3 mol
n(Zn) = n(ZnS) = 0.3 mol
M(ZnS) = 97 g/mol
m(ZnS) = n*M = 0.3 * 97 = 29.1 g
ответ 29.1 г
Объяснение:
дано
m(Zn) = 19.5 g
m(ZnS)-?
Zn+H2S-->ZnS+H2
M(Zn) = 65 g/mol
n(Zn) = m/M = 19.5 / 65 = 0.3 mol
n(Zn) = n(ZnS) = 0.3 mol
M(ZnS) = 97 g/mol
m(ZnS) = n*M = 0.3 * 97 = 29.1 g
ответ 29.1 г
Объяснение: