Task: Please answer the following question about the molecule with SMILES O=[Si]([O-])O[Si]([O-])([O-])O[Si](=O)[O-].[Mg+2].[Mg+2].
Question: What is the molecular weight of this compound's parent molecule?
Answer: 216.28
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=[Si]([O-])O[Si]([O-])([O-])O[Si](=O)[O-].[Mg+2].[Mg+2]
O=[Si]([O-])O[Si]([O-])([O-])O[Si](=O)[O-].[Mg+2].[Mg+2]
dimagnesium;dioxido-bis[[oxido(oxo)silyl]oxy]silane
What is the molecular weight of this compound's parent molecule?