An excess of aqueous AgNO3 reacts with

Question

44.5 mL of 5 M K2CrO4(aq) to form a precip-
itate. What is the precipitate?
1. K2CrO4
2. KNO3
3. Ag2CrO4
4. AgNO3
What mass of precipitate is formed?
Answer in units of g

Answer 1

You need to know the solubility rules. Here is a simplified set.
http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

Answer 2

786.6g