Question

Va rog,rezolvați cate puteti,rapid,dau 25 de puncte. ​

Answer 1

Răspuns:

1. MH2 =2×1=2g

MNH3 =14+3=17g/mol

3×2g 2×17g

N2+ 3H2=> 2 NH3

xg 34g

x=34×3×2/2×17= calculează

2.

MH2 =2×1=2g/mol

MHCl =1+35,5=36,5g/mol

2g 2×36,5g

H2+ Cl2 => 2HCl

26g xgH

x=26×2×36,5/2= calculează

3.

MFe =56g/mol

MFe2O3 =2×56+3×16=160g/mol

4×56g 2×160g

4Fe + 3O2 =>2 Fe2O3

168g ygFe2O3

y=168×2×160/4×56= calculează

4. MCaO=40+16=56g/mol

MHCl=1+35,5=36,5g/mol

56g 2×36,5g

CaO + 2HCl => CaCl2 + H2O

20g zgHCl

z=20×2×36,5/56=calculează

5.

MMg =24g/mol

MMgO =24+16=40g /mol

2×24g 2×40g

2Mg + O2=> 2MgO

xgMg 80g

x=80×2×24/2×40=calculează.