alleryStart learning →In Ca(OH)2, the oxygen and hydrogen atom counts are?
A1 oxygen, 2 hydrogen
B2 oxygen, 2 hydrogen
C1 oxygen, 1 hydrogen
D2 oxygen, 1 hydrogen
Answer & Solution
Correct answer: B. 2 oxygen, 2 hydrogen
The subscript outside the parentheses applies to the entire OH group, giving two oxygen atoms and two hydrogen atoms.
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