Answer:
molecular mass Al(OH)₃ = 78 amu
Explanation:
Molar mass = ∑ atomic masses
Al(OH)₃ => Al + 3O + 3H = 1(27amu) + 3(16amu) + 3(1amu) = (27 + 48 + 3)amu = 78amu*
*atomic mass units
