Potassium nitrate decomposes when heated, forming potassium nitrite and oxygen gas. HELP WITH PROBLEM PLZ?

Question

a)write a balanced equation for this reaction

b)wat mass of KNO3 would be needed to produce 18.4 liters of oxygen gas, measured at 775 mmHg and 15 degrees C?

c)wat mass of KNO2 would also be produced?

Answer 1

why do you use Torr, why can't you convert the 775 mgHg to 103,324.55 kPa, and then solve the equation using n= RT/PV?????