Answer : The moles of 
formed are, 22.3 moles.
Explanation : Given,
Moles of 
= 16.72 mol
The given chemical reaction is:
From the balanced chemical reaction, we conclude that:
As, 3 moles of react to give 4 moles of
So, 16.72 moles of react to give 
moles of
Therefore, the moles of formed are, 22.3 moles.
You would do 82.75 divided by 125 cm3 and get 0.6620 g/cm3 because to find density you mist divide mass and volume and grams is always mass and cm3 or mL is always volume. hope i helped!
Atomic mass=no of neutron+no of electron
Atomic mass=25+30
Atomic mass=55
