Asample of gold (au) has a mass of 35.12 g..
a. calculate the number of moles of gold (au) in the sample. .
b. calculate the number of atoms of gold (au) in the sample

a) 0.1783 moles of gold.

b) atoms of gold.

Explanation:

Mass of gold sample = 35.12 g

Atomic mass of gold = 197 g/mol

Moles of compound =

a) Moles of gold :'

1 mole = atoms. molecule

b) Number of gold atoms in 0.1783 moles:

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