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For each of the following solutions, calculate the molarity of the solution.

a. 2.62 g MgNH4PO4 in 400. mL solution
? mol/L

b. 12.3 g NaCH3COO in 400. mL solution
? mol/L

c. 3.28 g CaC₂04 in 400. mL solution
? mol/L

d. 5.91 g (NH4)2SO4 in 600. mL solution
? mol/L