This is the chemical formula for talc (the main ingredient in talcum powder): mg3si2o52oh2 an analytical chemist has determined by measurements that there are 9.62 moles of magnesium in a sample of talc. how many moles of silicon are in the sample? round your answer to 3 significant digits.

Answer : 6.41 moles of silicon are in the sample.

Solution : Given,

Moles of magnesium = 9.62 moles

The given chemical formula for talc is,

From the given chemical formula we conclude that

The stoichiometry of magnesium and silicon is 3 : 2

3 moles of magnesium is equivalent to 2 moles of silicon

9.62 moles of magnesium will be equivalent to moles of silicon

Therefore, the number of silicon present in sample are 6.41 moles.

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