Task: Answer the following question about the molecule with SMILES [133Xe].
Request: What is the molecular weight of this compound's parent molecule?
Result: 131.29
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
[133Xe]
[133Xe]
xenon-133
What is the molecular weight of this compound's parent molecule?
131.29