what mass of silver nitrate will react with 5.85

It seems like the question is incomplete, as the information provided is insufficient to calculate the mass of silver nitrate (AgNO3) that will react with a given substance (presumably 5.85 grams of another substance).

If you have a specific reaction equation or more details about the substances involved, you can use stoichiometry to calculate the mass of silver nitrate needed for the reaction.

The general steps for stoichiometric calculations are as follows:

1. Write the Balanced Chemical Equation:
   • Ensure that the chemical equation is balanced.
2. Convert Given Mass to Moles:
   • Convert the mass of the given substance to moles using its molar mass.
3. Use the Mole Ratio:
   • Use the coefficients from the balanced equation to set up a mole ratio between the given substance and the substance you want to find (in this case, silver nitrate).
4. Convert Moles to Mass:
   • Convert moles of the substance you want to find to the desired mass using its molar mass.

If you provide the complete chemical equation or more details about the substances involved, I can assist you further in performing the calculation.