Question

This is on gizmo:

95.0 g Al =

mol Al

2.10 mol FeCl2 =

molecules FeCl2

Answer 1

Number of moles of Al = 3.52 mol

12.65 × 10²³ molecules of FeCl₂

Step-by-step explanation:

Given data:

Mass of Al = 95.0 g

Moles of Al = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 95.0 g/ 27 g/mol

Number of moles = 3.52 mol

2)

Given data:

Number of moles of FeCl₂ = 2.10 mol

Number of molecules = ?

Solution:

We will use Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

2.10 mol × 6.022 × 10²³ molecules / 1mol

12.65 × 10²³ molecules of FeCl₂