Question

con 200g de Zn cuanto se forma de ZnSo4 y de H2 en gramos y moles?


por favor ayúdenme.

Answer 1

                     Zn + H2SO4 → ZnSO4 + H2↑

Mm H2SO4 = 98 g/mol
       ZnSO4 =  161.44 g/mol
              Zn = 65.38 g/mol

1. calcular moles  de  ZnSO4

gramos ZnSO4 = 200 g Zn  x 1  mol Zn  x  1 mol ZnSO4  x  161.44 g ZnSO4
                                                ``````````````   ```````````````````   ````````````````````````
                                              65.38 g Zn      1 mol Zn           1 mol ZnSO4

gramos ZnSO4 = 494.45  g

moles ZnSO4 = 200 g Zn  x     1  mol Zn   x  1 mol ZnSO4 
                                                ``````````````     ```````````````````  
                                                65.38 g Zn         1 mol Zn       

moles ZnSO4 = 3.059  

b) calcular moles de H2

moles de H2 = 200 g Zn  x     1  mol Zn   x      1 mol H2
                                                ``````````````     ```````````````````  
                                                65.38 g Zn         1 mol Zn     

moles H2 = 3.059

calcular gramos de H2

g H2 = 3.059 mol H2  x   2 g H2
                                      `````````````
                                      1 mol H2

g H2 = 6.118