How many formula units are in 4.4 grams of Cu(NO3)2 ?

1.45 x 10²²atoms

Explanation:

A formula unit is the number of elementary particles a specie contains.

A mole of any substance contains 6.02 x 10²³ number of particles. The particles can be atoms, molecules, formula units, electrons, protons and so forth.

To solve this problem, we find the number of moles from the given mass first.

       Number of moles  =  

Molar mass of Cu(NO₃)₂  = 63.5 + 2(14 + 3(16)) = 187.5g/mol

    Number of moles  =  = 0.024mole

Now,

 Number of formula units  = 0.024 x 6.02 x 10²³  = 1.45 x 10²²atoms

the answer to this question is 3.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl