using molarity to find solute moles and solution volume

Question

A chemist adds 180.0 mL of a 5.8 mol/L silver nitrate (AgNO3) solution to a reaction flask. Calculate the millimoles of silver nitrate the chemist has added to the flask. Round your answer to 2 significant digits.

Answer 1

Several questions of the same/similar type, so you really need to understand how to do these problems. I've done several and will do this one, but then I'll leave the others to you (or some other tutor).

This is simply a matter of using dimensional analysis to find the answer using the information that is given.

Convert 180.0 mls to liters: 180.0 mls x 1 L / 1000 mls = 0.1800 L

Dimensional analysis: mols / L x L = mols

-- 5.8 mols / L x 0.1800 L = 1.044 mols

Convert mols to mmols

-- 1.044 mols x 1000 mmols / mol = 1044 mmols = 1.0x10³ mmols (2 sig. figs.)