Respuesta :

superman1987

Answer:

B. 39.1 g.

Explanation:

  • It is known that every 1.0 mole of any atom contain Avogadros no. of atoms (6.022 x 10²³).

∴ 6.02 x 10²³ atoms are in 1.0 mol of K.

  • We need to calculate the mass of 1.0 mol of K using the relation:

∴  mass of K =  no. of moles of K x atomic mass of K = (1.0 mol)(39.1 g/mol) = 39.1 g.

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