Question

Suppose that a solution containing 3.50 grams of sodium phosphate (Na3PO4) is mixed with a solution containing 6.40 grams of barium nitrate (Ba(NO3)2). Calculate the theoretical yield of barium phosphate (Ba3(PO4)2) during this reaction.
2Na3PO4 + 3Ba(NO3)2 Ba3(PO4)2 + 6NaNO3

3.50 grams
4.91 grams
4.02 grams
6.40 grams
9.90 grams

Answer 1

Using a periodic table, or one with compounds, you need to find the molecular mass of each product and reactant.
Then using that information you have to convert the mass of each one of your reactants to moles, considering the stoichiometry of the reaction certain moles of your reactants will yield certain moles of your product. Then you need to convert those moles to mass again by using the data you searched in the beginning.
One more thing you have to do is check wich one of your reactants is in excess and which one is not.