Answer: 1.63 moles
Step-by-step explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:
Given mass = 223 g
Molar mass = 136.4
Thus there are 1.63 moles in 223 g of the compound.