Respuesta :

nkirotedoreen46

Answer:

5.027 × 10^-12 g

Explanation:

Assuming the number of atoms given is;

  • 1.5 × 10^11 atoms of Neon

We can get the mass of the atoms given;

  • We need to know that 1 mole of an element contains atoms that are equivalent to the Avogadro's number.
  • That is, 1 mole of an element = 6.022 × 10^23 atoms

In this case;

  • 1 mole of Ne contains 6.022 × 10^23 atoms
  • Therefore, to get the  mass of the atoms given;
  • Molar mass of Ne is 20.18 g/mol

Therefore;

20.18 g contains 6.022 × 10^23 atoms

Thus;

Mass = (20.18 g × 1.5 × 10^11 atoms) ÷ 6.022 × 10^23 atoms

         = 5.027 × 10^-12 g

Therefore, 1.5 × 10^11 atoms of Neon contains a mass of 5.027 × 10^-12 g

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