how many grams of potassium iodide can be produced by the reaction of 150 grams of iodide and 45.6 grams of potassium?

Answer 1

This is a limiting reagent (LR) problem.
I know that because amounts are given for BOTH reactants.
2K | i2 ==> 2kI

mols K = grams/molar mass
mols I2 = grams/molar mass

Using the coefficients in the balanced equation, convert mols K to mols KI.
Do the same for mols I2 to mols KI. It is likely that the values will not agree; the correct value in LR problem is ALWAYS the smaller value and the reagent producing that value is the LR.

Using the smaller value for mols KI, convert to g. g = mols x molar mass.