Question

Rezolvati , test chimie

Answer 1

1. c...d

2.F,A,A,F,A

3, a-4; b-1; c-2; d-3

4. Ca(OH)2 + co2---> CaCO3+H2O

     2 Ca+ O2---2CaO

     2KClO3---> 2KCl+3o2

     C+ 2CuO--> CO2 + 2Cu

     C+ 2H2O----> CO2+2H2

5.   c=mdx100/ms---> md= 10x1480/100g=148g Ca(OH)2

niu= m/M= 148g/(40+2+32)g/mol= 2mol

6.    12g.......................16g

        C   +2H2------> CH4

      48g.....................x= 4x16g= 64gCH4