What is the mass of a portion of potassium phosphate, the amount of substances is 0.75?

univerkov | November 23, 2020 | education

m (K3PO4) -?
n (K3PO4) = 0.75 mol, formula m = n * M, then
M (K3PO4) = Mr (K3PO4)
Mr (K3PO4) = Ar (K) * 3 + Ar (P) + Ar (O) * 4 = 39 * 3 + 31 + 16 * 4 = 212
m (K3PO4) = n (K3PO4) * M (K3PO4) = 0.75 mol * 212 g / mol = 159 g
Answer: m (K3PO4) = 159 g

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