Number of units in one mole of any substance equal to 6.022*10^23 (Avogadro's constant). Thus, the quantity of potassium (K) atoms in 0.0317 mol of substance can be calculated by following way:
N(K) = 6.022*10^23 mol^(-1) * 0.0317 mol = 1.909*10^22 atoms.
Answer: 1.909*10^22 atoms are in 0.0317 mol of potassium (K).
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