What is the total number of atoms contained in 2.11 moles of nickel?

1.27 × 10²⁴ atoms of nickel are contained in 2.11 moles of nickel. For every mole of a substance there are 6.022 × 10²³ representative particles of that substance. The amount of particles in one mole of substance is called Avogadro's number.

To convert from the number of moles to number of representative particles, the formula below may be used:

For this problem, the number of nickel atoms can be determined by plugging in the given values in the equation above:

Since the given only has three significant figures, the final answer with the correct number of significant figures is:

Keywords: moles conversion, Avogadro's number

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !