Prelab Questions 1) List the four compounds of interest and there molecular weights in the experiment. 2) If 2.000 g of mixture of NaCl and BaCl? 2H?O is heated and the mass of the sample following the heating is 1.878 g is recovered. a. What accounts for the loss of mass of the sample? b. How many moles of the lost molecule are no longer there? c

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Prelab Questions 1) List the four compounds of interest and there molecular weights in the experiment. 2) If 2.000 g of mixture of NaCl and BaCl? 2H?O is heated and the mass of the sample following the heating is 1.878 g is recovered. a. What accounts for the loss of mass of the sample? b. How many moles of the lost molecule are no longer there? c. What is the molar ratio of the lost molecule to the reactant molecule that it was originally part of? d. How many moles of the reactant molecule from part c were in the original sample? 3) From question 2, a. How many grams of BaCl? 2H?O were in the original sample? b. How many grams of NaCl were in the original sample? c. What percentage of the original sample was BaCl? 2H?O? d. What percentage of the original sample was NaCl?

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