Question

1.Care Este masa de H continuta in 54 g H2O
2.Ce Masa de HCl contine 5 g H

Answer 1

Răspuns:

Explicație:

1.

-se afla masa molara a apei

M H2O= 2 + 16=18------> 18g/moli

18g H2O----------------2g H

54gH2O------------------x

x= 54 . 2 : 18=6 g H

2

MHCl= 1 + 35,5=36,5-----> 36,5g/moli

36,5g HCl--------------------1 g H

xg HCl-------------------------5 g H

x= 36,5 . 5=182,5 g HCl