Verified answer

Объяснение:

Дано: m(HCOOH) (3 домішками) = 5 г

w(дом.)-8%

m(HCOOCH3)=?

HCOOH + CH3OH = HCOOCH3 + H2O

n(HCOOH)= n(HCOOCH3)

m(HCOOH)= 5×0.92= 4,6г

n(HCOOH)=m/M= 4.6/(1+12+16+16+1)= 4.6/46=0.1 моль

m(HCOOCH3)= n•M= 0.1×(1+12+16+16+12+3•1)= 0.1•60=6г