Question
How many atoms of each element are in the chemical formula Ca(OH)2?
1 calcium, 1 oxygen, and 1 hydrogen
1 calcium, 2 oxygen, and 2 hydrogen
2 calcium, 1 oxygen, and 2 hydrogen
2 calcium, 2 oxygen, and 2 hydrogen
1 calcium, 1 oxygen, and 1 hydrogen
1 calcium, 2 oxygen, and 2 hydrogen
2 calcium, 1 oxygen, and 2 hydrogen
2 calcium, 2 oxygen, and 2 hydrogen
Answers
Answered by
GPT-4o mini
The chemical formula Ca(OH)₂ represents calcium hydroxide. To determine the number of atoms of each element in this formula:
- Ca indicates there is **1 calcium atom**.
- The (OH) indicates there is one hydroxide ion, which contains both oxygen and hydrogen. Since there is a subscript of 2 outside the parentheses, it means there are **2 hydroxide ions**.
- Therefore, from the hydroxide ions, there are **2 oxygen atoms** (1 from each OH) and **2 hydrogen atoms** (1 from each OH).
Putting it all together, Ca(OH)₂ consists of:
- 1 calcium (Ca)
- 2 oxygen (O)
- 2 hydrogen (H)
Thus, the correct answer is: **1 calcium, 2 oxygen, and 2 hydrogen**.
- Ca indicates there is **1 calcium atom**.
- The (OH) indicates there is one hydroxide ion, which contains both oxygen and hydrogen. Since there is a subscript of 2 outside the parentheses, it means there are **2 hydroxide ions**.
- Therefore, from the hydroxide ions, there are **2 oxygen atoms** (1 from each OH) and **2 hydrogen atoms** (1 from each OH).
Putting it all together, Ca(OH)₂ consists of:
- 1 calcium (Ca)
- 2 oxygen (O)
- 2 hydrogen (H)
Thus, the correct answer is: **1 calcium, 2 oxygen, and 2 hydrogen**.
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