Question

An element has a face centred cubic unit cell with a length of 352.4 pm along the edge the density of the elements is 8.9g/cm³.how many atoms are present in 100g of an element,?

Answer 1

Answer:

Given

<br> Density

<br> Number of Atom in unit cell of fcc =4 <br> Edge length

<br> Avogadro's number

<br> Mass of element 100g <br>

<br>

<br>

mole <br> Moles of element

<br>

<br> =1.7 moles. <br> As, 1 mole contains

number of atoms. <br> So, 1.7 mole contains

<br>

number of atoms. <br>

The number of atoms present in 100g of element is

.