Also what is the mass needed to make 100 mL of a 10 M soluti

Also what is the mass needed to make 100 mL of a .10 M solution?

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also what is the mass of Na2HPO4 needed to make 100 mL of a .10 M solution?

Solution

1) sodium acetate trihydrate

2) molar mass of Na2HPO4 = 141.96 g/mol

moes of NaHPO4 = 0.10 M x (100/1000) L = 0.01 mol

mass of NaHPO4 - moles x molar mass = 0.01 x 141.96 = 1.42 g