Question

care este masa moleculara a bazelor Ca(OH)2 si Al(OH)3 ?

Answer 1

M[Ca(OH)2]=A(Ca)+2A(O)+2A(H)
M=40+2•16+2•1
M=40+32+2=74g/mol Ca(OH)2

M[Al(OH)3]=A(Al)+3A(O)+3A(H)
M=27+3•16+3•1
M=27+48+3=78g/mol

M[...]=masa moleculara
A(...)=masa atomică