Question

5 fill in the blank 3 points a compound has the formula 3al(oh)₃. how many total atoms are there? aluminum type your answer... oxygen type your answer... hydrogen type your answer...

Explanation:

Step1: Analyze the formula

The formula is \(3Al(OH)_3\). The coefficient \(3\) outside the parentheses means there are \(3\) units of \(Al(OH)_3\).

Step2: Calculate the number of Aluminum atoms

For Aluminum (\(Al\)), there is \(1\) \(Al\) atom in each \(Al(OH)_3\) unit. With the coefficient \(3\), the number of \(Al\) atoms is \(3\times1 = 3\).

Step3: Calculate the number of Oxygen atoms

In \((OH)\), there is \(1\) oxygen atom. The sub - script \(3\) outside the \((OH)\) group means there are \(3\) \(OH\) groups in each \(Al(OH)_3\) unit. And with the coefficient \(3\) for the whole \(Al(OH)_3\) formula, the number of \(O\) atoms is \(3\times3\times1=9\).

Step4: Calculate the number of Hydrogen atoms

In \((OH)\), there is \(1\) hydrogen atom. The sub - script \(3\) outside the \((OH)\) group means there are \(3\) \(OH\) groups in each \(Al(OH)_3\) unit. And with the coefficient \(3\) for the whole \(Al(OH)_3\) formula, the number of \(H\) atoms is \(3\times3\times1 = 9\).

Answer:

Aluminum: \(3\)
Oxygen: \(9\)
Hydrogen: \(9\)