Question

This is on gizmo:

Answer 1

Answer:

Explanation:

Given data:

Mass of aluminium = 95.0 g

Moles of Al = ?

Solution:

Number of moles = mass/ molar mass

Molar mass of aluminium = 27 g/mol

Number of moles = 95.0 g / 27 g/mol

Number of moles = 3.52 mol

Given data:

Moles of FeCl₂ = 2.10 mol

Number of molecules = ?

Solution:

The given problem will solve by using 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.

For example,

1 mole = 6.022 × 10²³ molecules

2.10 moles × 6.022 × 10²³ molecules  / 1 mol

12.65  × 10²³ molecules of FeCl₂