Complete each gap with a, an, the or no article (0). — Заполните каждый пробел артиклем. Make-up During 1) the nineteenth century it was unfashionable to wear

CaCO3+2HCl=CaCl2+CO2+H2O
CO2+2NaOH=Na2CO3+H2O
m(в-ва NaOH)=200*0.1=20г
n(NaOH)=20/40=0.5моль
n(CO2)=0.2(в недостатке)
n (Na2CO3)=0.2
m(Na2CO3)=0.2*106=21.2г