Asample of ni(co)4, a toxic transition-metal complex, has 5.23 x 10^24 atoms of carbon. how many atoms of ni does it contain? a. 6.02 x 10^23 atoms b. 1.50 x 10^23 atoms c. 1/4 atom d. 20.9 x 10^23 atoms e. 1.31 x 10^24 atoms

In Ni(CO)₄ the stoichiometry of Ni to C is 1:4
for every 4 atoms of C is attached to one Ni atom.
this means that if there are 4 atoms of C - 1 atom of Ni
in 5.23 x 10²⁴ atoms of C -1/4 x 5.23 x 10²⁴ atoms of Ni
                                        = 1.3075 x 10²⁴ atoms of Ni
the number of atoms rounded off to the second decimal place = 1.31 x 10²⁴ atoms 
correct answer is E

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