Question

How many iron atoms are there in 2.50moles of each of the following? FeWO4 =? Atoms of Fe

Answer 1

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. Calculations are as follows:

 2.50 mol FeWO4 ( 1 mol Fe / 1 mol FeWO4 ) ( 6.022 x 10^23 atoms Fe / 1 mol Fe )= 1.51 x 10^24 atoms Fe

Answer 2

There are 1.505 .10²⁴ iron atoms in 2.5 moles Wolframite (FeWO₄)

Further explanation

Stoichiometry in Chemistry learn about chemicals mainly emphasizes quantitative, such as the calculation of volume, mass, number, which is related to numbers, molecules, elements, etc.

The empirical formula (EF) is the smallest atomic ratio of the constituent elements.

The empirical formula shows the simplest comparison of the atoms making up the molecule

Molecular formula (MF) is a formula that shows the number of atomic elements that make up a compound.

(EF)n = MF

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

While the number of moles can also be obtained by dividing the mass (in grams) with

$\large{\boxed{\bold{mole\:=\:\frac{grams}{the\:relative\:mass\:of\:elements\:or\:the relative\:mass\:of\:molecules} }}}$

In the Wolframite( FeWO₄) compound there is 1 mole of Fe atom from 1 mole of FeWO₄ molecule

So if there are 2.5 moles of FeWO₄, the number of Fe moles is the same as 2.5 moles of Fe

Then the number of Fe atom particles in 2.5 mol Fe is:

2.5 x 6.02.10²³ particles  = 1.505 .10²⁴ iron atoms

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Keywords: mole, Avogadro’s number, FeWO4, atoms, iron