Ch3cooh+ca(oh)2= ch3cooh+hcl= ch3cooh+na2o= ch3cooh+k2co3=

ch3cooh+ca(oh)2=(сh3coo)2ca+2h2o;

ch3cooh+hcl=ch3coocl+h2;

ch3cooh+na2o=2ch3coona+h2o;

ch3cooh+k2co3=ch3cook + h2co3  => (co2  + h2o)

3mno2 + 4al = 2al2o3 + 3mn

n(mno2)= 84/(55+32)=0.9655 моль

n(mn)= n(mno2)=0.9655 моль m(mn)= 0.9655*55=53.1 гр

хотя на самом деле

4mno2 = 2mn2o3 + o2

mn2o3 + 2al = 2mn =al2o3