Question

Calculate the number of molecules in 8.21 x 10^-2 moles in (NH4)2Cr2O7

Answer 1

4.94x10^22 molecules

Step-by-step explanation

to calculate the number of molecules in 8.21x10^-2 moles ca be determined by using Avogadros number

we know that

1 mol has 6.022x10^23 molecules

therefore,

8.21x10^-2 moles have:

(8.21x10^-2) x (6.022x10^23)

= 4.94x10^22 molecules