Question

1) Aşezati bazele în ordinea
crescatoare a masei lor;
Ex: Na oH :
M NAOH( 1 × A NA + 1 × A H ;
23 + A + 16 = 40 g/mase)
Al(OH)3
Ca (OH)2
N H4 OH
Multumesc.​

Answer 1

Calculăm masele:

mAl(OH)3=27+3*16+3=27+48+3=75+3=78 g/mol

mCa(OH)2=40+2*16+2=40+32+2=72+2=74g/mol

mNH4OH=14+4+16+1=18+16+1=34+1=35 g/mol

NH4OH <NaOH<Ca(OH)2<Al(OH)3

Baftă!