What is the formula weight of aluminum hydroxide, Al(OH)₃?

Question

Quizplus · Accepted Answer

The formula weight of aluminum hydroxide, Al(OH)3, is calculated by adding the atomic weights of all atoms in the formula: Aluminum (Al) has an atomic weight of about 27 u, and each oxygen (O) and hydrogen (H) pair in the hydroxide (OH) group has a combined atomic weight of about 17 u (16 u for oxygen and 1 u for hydrogen). Since there are three hydroxide groups, the total weight of the hydroxide groups is 3 * 17 u = 51 u. Adding the weight of aluminum, the total formula weight is 27 u + 51 u = 78 u.

What Is the Formula Weight of Aluminum Hydroxide, Al(OH)3

What Is the Formula Weight of Aluminum Hydroxide, Al(OH)₃