Q1: 1g unknown mixture of BaCl2.2H2O and Na3PO4.12H2O is dissolved in water . the weight of Ba3(PO4)2 is 0.6 g ,calculate the % of each salt present in the mixture if the BaCl2.2H2O is the limiting reactant.

m.mass BaCl2.2H2O=244.2g/mol
M.mass Na3PO4.12H2O=380.2g/mol
m.mass Ba3(PO4)2 =602.2g/mol

Q2:
if the mass of Mg 0.05g, and the mas of ash is 0.1g calculate the emperical formula of magnisiume oxide.
M.Mass Mg=24g/mol
M.Mass O= 16g/mol

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