The Production of Oxygen in Laboratories

The following reaction is used in laboratories to produce oxygen:

2KclO3 (s) ----> 2KCl (s) + 3O2 (g)

At 25 degrees Celsius and one atmosphere pressure, how many liters of O2 gas will be produced from the reaction of 165g of KClO3?

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...-----> 3 moles O2
x moles KClO3 -----> how many moles of O2?
Doing the cross multiplication between these above we can say that number of moles of oxygen produced = 3x/2

Since we have 165g KClO3, we can use the molar mass of KClO3 to find the moles. since m=MMxmoles, so the number of ...