What volume of oxygen at s.t.p will be obtained when 24.5g of potassium trioxochlorate (v) crystals are heated?

2 answers

how many moles in 24.5g?
per the reaction equation, how many moles of O2 are produced?
1 mole occupies 22.4L at STP
what is the volume of oxygen at s t p will be obtained when 24.5g of potassium trioxochlorite