Question

What is the mass of 1.4•10 power of 23 formula units of BeCl2

Answer 1

`m_(BeCl_2)=18.6gBeCl_2`

Step-by-step explanation:

Hello,

In this case, we first relate the given formula units of beryllium chloride as molecules with moles by using the Avogadro's number:

`n_(BeCl_2)=1.4x10^(23)molecules*(1mol)/(6.022x10^(23)molecules)=0.23molBeCl_2`

Now, we use its molar mass (80g/mol) to compute the required mass:

`m_(BeCl_2)=0.23molBeCl_2 *(80gBeCl_2)/(1molBeCl_2) \\\\m_(BeCl_2)=18.6gBeCl_2`

Best regards.