Question

quiz 8.6be- counting atoms, chemical equations and the law of conservation of mass
2 of 10
possible points: 6.25
use the periodic table to identify the atoms involved in the following chemical reaction.
2fe(oh)₃ ---> fe₂o₃ + 3h₂o

○ fluorine, oxygen, and hydrogen
○ iron, oxygen, and helium
○ iron, oxygen, and hydrogen
○ fluorine, osmium, and hydrogen

Explanation:

To identify the atoms in the chemical reaction \(2\text{Fe(OH)}_3
ightarrow \text{Fe}_2\text{O}_3 + 3\text{H}_2\text{O}\), we analyze the chemical formulas:

• In \(\text{Fe(OH)}_3\), the symbols are Fe (iron), O (oxygen), and H (hydrogen).
• In \(\text{Fe}_2\text{O}_3\), the symbols are Fe (iron) and O (oxygen).
• In \(\text{H}_2\text{O}\), the symbols are H (hydrogen) and O (oxygen).

So the atoms involved are iron (Fe), oxygen (O), and hydrogen (H). We now check the options:

• The first option has fluorine (F), which is not present.
• The second option has helium (He), which is not present.
• The third option has iron, oxygen, and hydrogen, which matches our analysis.
• The fourth option has fluorine (F) and osmium (Os), which are not present.

Answer:

C. iron, oxygen, and hydrogen