12. The following question(s) refer to the mass spectrum shown below. 
The base peak in this spectrum occurs at a mz of___.
This compound contains C, H, and one other atom. The other atom from the mass spectrum is ___.
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12. The following question(s) refer to the mass spectrum shown below.
The base peak in this spectrum occurs at a mz of___.
This compound contains C, H, and one other atom. The other atom from the mass spectrum is ___.