Question

1.505 times 10^23 Na atoms

Answer 1

Explanation:

Given:

Number of atoms = 1.505 x 10²³

Let us solve for the number of moles and mass of this atom of sodium.

A mole of a substance is the amount of that substance that contains the avogadro's number of particles.

     1 mole of Na = 6.02 x 10²³ atoms

Number of moles of Na  = $\frac{1.505 x 10^{23} }{6.02 x 10^{23} }$   = 0.25moles

Mass of Na = number of moles x molar mass

Molar mass of Na = 23g/mole

 Mass of Na = 0.25 x 23 = 5.75g

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Number of moles brainly.com/question/1841136

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