how do i find the number of moles of oxygen atoms in: Al(OH)3
To find the number of moles of oxygen atoms in Al(OH)3, we need to consider the chemical formula and the concept of moles.
Step 1: Identify the chemical formula
The chemical formula of Al(OH)3 tells us that there is one aluminum atom (Al), three hydroxide ions (OH), and a total of three oxygen atoms. Each hydroxide ion consists of one oxygen atom and one hydrogen atom.
Step 2: Determine the number of moles of oxygen atoms
To find the number of moles, we need the atomic masses of the elements and the formula weight of the compound. The atomic masses of aluminum, oxygen, and hydrogen are approximately 26.98 g/mol, 16.00 g/mol, and 1.01 g/mol, respectively.
Since there are three oxygen atoms in Al(OH)3, we can calculate the moles of oxygen as follows:
Moles of oxygen = (Number of oxygen atoms × Atomic mass of oxygen) / Formula weight of Al(OH)3
Moles of oxygen = (3 × 16.00 g/mol) / (26.98 g/mol + 3 × 1.01 g/mol + 3 × 16.00 g/mol)
Moles of oxygen = 48.00 g/mol / 78.95 g/mol
Moles of oxygen ≈ 0.608 moles
Therefore, there are approximately 0.608 moles of oxygen atoms in Al(OH)3.