Question

Find the number of moles in each of the number of representative particles.

Answer 1

Explanation:

A mole is the amount of matter or substance that contains the Avogadro's number of particles.

  1 mole of a substance = 6.02 x 10²³ atoms

Now solving:

a:

  1.2 x 10² atoms ;

   Number of moles = $\frac{1.2 x 10^{2} }{6.02 x 10^{23} }$  = 2.0 x 10⁻²¹moles

b:

 3.87 x 10²¹ molecule:

   Number of moles = $\frac{3.87 x 10^{21} }{6.02 x 10^{23} }$  = 6.4 x 10⁻³moles

c. 4.81 x 10¹⁴ molecules:

   Number of moles = $\frac{4.81 x 10^{14} }{6.02 x 10^{23} }$ =  8.0 x 10⁻¹⁰moles

Number of molecules = number of atoms = formula units

learn more:

Number of moles brainly.com/question/1841136

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