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how many moles of nickel are in atoms are there in 9.00 X 10^9 Ni atoms

Sagot :

CrystalQueen

Answer:

1.49 x 10⁻¹⁴ moles Ni

Explanation:

To find the amount of moles in the sample, you need to multiply the amount of atoms by Avogadro's Number. This conversion is a ratio that describes how many atoms there are per every 1 mole.  It is important to arrange the ratio in a way that allows for the cancellation of units (atoms should be in the denominator). The final answer should have 3 sig figs like the given value.

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

 9.00 x 10⁹ atoms Ni                     1 mole
---------------------------------  x  --------------------------------  =  1.49 x 10⁻¹⁴ moles Ni
                                              6.022 x 10²³ atoms

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