Question

Calculeaza masa de oxigen din:
a) 160g NaOH
b) 222g Ca(OH)2

Dau coroana!!!

Answer 1

Răspuns:

Explicație:

a.

MNaOH= 23 +16 +1= 40--------> 40g/moli

40g NaOH----------16g O

160g NaOH----------xg O

x= 160. 16g : 40=64  g O

b.

MCa(OH)2= 40 + 2.16 +2= 74-------> 74g/moli

74g Ca(OH)2-------------32g O

222g Ca(OH)2-------------y

y= 222. 32 : 74=96 g O