Question

Calculate the moles of (NH4)2 Cr2O7 given 7.34 x 10E24 atoms of oxygen

Answer 1

12.2moles

Explanation:

Given parameters:

Number of atoms = 7.34 x 10²⁴atoms

Unknown:

Number of moles in the compound = ?

solution:

A mole of a substance contains avogadro's number of particles, i.e 6.02 x 10²³

  Number of moles = $\frac{number of particles }{6.02 x 10²³}$

  Number of moles =  $\frac{ 7.34 x 10[tex]^{24}$}{6.02 x 10$^{23}$}[/tex]

  Number of moles = 12.2moles

Learn more:

Number of moles brainly.com/question/1841136

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