how many moles of Si(OH)4 form when 4.01 moles of H2O react with an excess of SiCl4?

To determine the number of moles of Si(OH)4 that form when 4.01 moles of H2O react with an excess of SiCl4, you need to consider the balanced chemical equation for the reaction between H2O and SiCl4.

The balanced equation is as follows:
SiCl4 + 4H2O -> Si(OH)4 + 4HCl

According to this equation, 1 mole of SiCl4 reacts with 4 moles of H2O to produce 1 mole of Si(OH)4.

Since there is an excess of SiCl4, it means that all 4.01 moles of H2O will react completely. Therefore, the number of moles of Si(OH)4 formed will also be 4.01 moles.

So, in this reaction, 4.01 moles of Si(OH)4 form when 4.01 moles of H2O react with an excess of SiCl4.