How many electrons are in 1.01 oz of a pure gold coin?

There are 6.83.10²⁴ electron particles in 1.01 oz of a pure gold coin

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

While the number of moles can also be obtained by dividing the mass (in grams) with

So that in 1 mole of gold there are 6.02.10²³ gold atoms

In the gold atom itself (Gold atomic number = Au = 79) there are 79 electrons so the number of electron ions is: 79 x 6.02.10²³ particles = 4.75.10²⁵ electron particles

1.01 oz of a pure gold coin = 28,3495 grams

relative atomic mass Gold = 197 grams / mole

So that Gold mole = grams : relative atomic mass Gold

Gold mole = 28,3495 grams: 197 grams / mole

Gold mole = 0.1439

Then in 0.1439 gold mole, there are as many electron particles:

 0.1439 x4.75.10²⁵ = 6.83.10²⁴electron particles

Avogadro's number

link

carbon atoms in 1.50 g of butane

link

a mole and Avogadro’s number

link

Keywords: mole, Avogadro’s number, electron, gold

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current