Question
The atomic mass of hydrogen is 1.01. What is the mass of hydrogen in one mole of aluminum hydroxide (Al(OH)3)?
A.
1.01 g
B.
1.01 kg
C.
3.01 g
D.
3.03 g
E.
3.03 kg
A.
1.01 g
B.
1.01 kg
C.
3.01 g
D.
3.03 g
E.
3.03 kg
Answers
Answered by
GPT-4o mini
To determine the mass of hydrogen in one mole of aluminum hydroxide \(\text{Al(OH)}_3\), we first need to analyze the chemical formula.
The formula \(\text{Al(OH)}_3\) indicates that there are three hydroxide ions (OH) associated with one aluminum ion (Al). Each hydroxide ion contains one hydrogen atom.
1. **Count the number of hydrogen atoms:**
In \(\text{Al(OH)}_3\), there are 3 hydroxide ions, which means there are 3 hydrogen atoms.
2. **Calculate the mass of hydrogen atoms:**
Given that the atomic mass of hydrogen is 1.01 g/mol, the total mass of hydrogen in one mole of \(\text{Al(OH)}_3\) can be calculated as follows:
\[
\text{Mass of hydrogen} = \text{Number of hydrogen atoms} \times \text{Atomic mass of hydrogen}
\]
\[
\text{Mass of hydrogen} = 3 \times 1.01 \, \text{g/mol} = 3.03 \, \text{g}
\]
Therefore, the mass of hydrogen in one mole of aluminum hydroxide \(\text{Al(OH)}_3\) is **3.03 g**.
The correct answer is **D. 3.03 g**.
The formula \(\text{Al(OH)}_3\) indicates that there are three hydroxide ions (OH) associated with one aluminum ion (Al). Each hydroxide ion contains one hydrogen atom.
1. **Count the number of hydrogen atoms:**
In \(\text{Al(OH)}_3\), there are 3 hydroxide ions, which means there are 3 hydrogen atoms.
2. **Calculate the mass of hydrogen atoms:**
Given that the atomic mass of hydrogen is 1.01 g/mol, the total mass of hydrogen in one mole of \(\text{Al(OH)}_3\) can be calculated as follows:
\[
\text{Mass of hydrogen} = \text{Number of hydrogen atoms} \times \text{Atomic mass of hydrogen}
\]
\[
\text{Mass of hydrogen} = 3 \times 1.01 \, \text{g/mol} = 3.03 \, \text{g}
\]
Therefore, the mass of hydrogen in one mole of aluminum hydroxide \(\text{Al(OH)}_3\) is **3.03 g**.
The correct answer is **D. 3.03 g**.