Question

Calculate the number of moles in 75g of Au (Atomic mass = 79 u)

Answer 1

Explanation:

Formula for finding the number of moles :

Mathematically [n = m / M] , where

n - required no of moles

m - given molar mass ( 75g ) of Au ( GOLD )

M - Atomic mass ( 79 u is equivalent to 79 gram molecular mass )

Solution :

n = (75g) / (79g/mol)

so, number of moles (n) = 0.9493 mol