3. How many atoms are there in 1 kg of gold, if its atomic mass is 197 u?

Let’s calculate the molar quantity of gold first.

(1000×g)/(196.97×g×mol^-1) = 5.077 mole

So we know that 1 mole of anything = 6.02214076×10^23 of individual objects.

So we can multiply this value by our molar quantity of gold.

5.077 × 6.02214076×10^23 = 3.057 × 10^24 atoms of gold.

Therefore, 1 kg of a gold bar has 3.057 × 10^24 atoms

Explanation:

it is easily magnetized.

no sign of dia of fuel cell