Question

How many atoms are in 578g Na

Answer 1

1.51 x 10²⁵atoms

Explanation:

Given parameters:

Mass of Na = 578g

Unknown:

Number of atoms = ?

Solution:

 To find the number of atoms, we must first find the number of moles the given mass contains.

  Number of moles  = $\frac{mass}{molar mass}$

   molar mass of Na = 23g

 Number of moles =  $\frac{578}{23}$ =  25.13moles

   1 mole of a substance = 6.02 x 10²³atoms

    25.13 mole of Na = 25.13 x  6.02 x 10²³atoms

 This gives  1.51 x 10²⁵atoms of Na

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Avogadro's constant brainly.com/question/2746374

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