Answer to Question #227023 in General Chemistry for Hamiza

Question

Calculate the mass in g of potassium chloride and volume in dm3 of oxygen gas produced at S.T.P when 100g potassium chlorate is decomposed

Answer 1

2KClO3….>2KCl+3O2

No of Moles of KClO3=mass/RMM=4.72/122.5=0.0385 Moles

No of Moles of oxygen=3×0.0385/2=0.058

Mass of oxygen=no.of Moles×RAM=0.058×32=1.85g

100g =70 litres

1.85g=?

70×1.85/1000=0.195 litres