Question

Определить изменение скорости химической реакции, если концентрация реагирующих веществ в системе изменится 3 раза:
1) CH3COOC2H5+NaOH=CH3COONa+C2H5OH
2) 4HCl+O2=2H2O+2Cl2
3) Ca+2H2O=Ca(OH)2+H2

Answer 1

1. Complete the text. Write a, an or the. (3 балла)
There’s an art gallery near my school. I sometimes go to (1) _________ art gallery when I’ve got homework for art class. There’s (2) _________ café there. I usually buy (3) _________ drink. (4) _________café is really nice, and it isn’t (5) _________ expensive place!