Question

In 18,5 grame hidroxid de calciu se gasesc :

a) 8 g O

b) 6 g O

c) 10 g O​

Answer 1

Răspuns:

a) 8 g O

Explicație:

masa Ca(OH)2=40+16*2+1*2=74g/mol

74gCa(OH)2....40gCa....32gO2....2gH2

18,5gCa(OH)2...xgCa.....ygO2....zgH2

y=(18,5*32)/74=8g O