Limit Answer

The first question is a simple "Mole Map" problem: start with the grams of silver nitrate and convert them into moles of silver nitrate and then convert those moles into moles of silver chloride that are then converted into grams of silver chloride.

  1. silver nitrate grams to moles = divide starting grams by molar mass of silver nitrate
  2. silver nitrate moles to moles of silver chloride = multiply the above answer by the mole ratio in the balanced equation
  3. moles of silver chloride to grams of silver chloride= multiply the above answer by the molar mass of silver chloride.

The second question is a limiting reagent problem. You must first determine which reactant will give the LEAST amount of product.

  1. convert grams of silver nitrate to moles of silver nitrate
  2. convert moles of silver nitrate to moles of silver chloride
  3. convert grams of sodium chloride to moles of sodium chloride
  4. convert moles of sodium chloride to moles of silver chloride
  5. Compare the answers in #2 and #4, the smallest value of silver chloride is from the limiting reagent.
  6. Take the smallest value of silver chloride and convert it to grams of silver chloride.

Voila you have the answer!

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