How many atoms are found in 4.20 g of magnesium?

There are 1.041×10²³ atoms in 4.20g of Magnesium.

Explanation:

To find the amount of atoms in 4.20 g of Magnesium we need de molar mass of Mg: 24.305 g/mol

According to Avogadro number there are 6.022×10²³ particles in 1 mol, so the number of atoms of Mg is:

The number of atoms found in given amount of magnesium is

Explanation:

To calculate the number of moles, we use the equation:

Given mass of magnesium = 4.20 g

Molar mass of magnesium = 24.31 g/mol

Putting values in above equation, we get:

According to mole concept:

1 mole of an element contains number of atoms

So, 0.173 moles of an element contains = number of atoms

Hence, the number of atoms found in given amount of magnesium is

a) the particles of the chair are strongly held together.