Question: how many moles of potassium nitrate are produced when two moles of potassium phosphate react?
Answer: So clearly 1 mole of each reactant combines to form 3 moles potassium nitrate and 1 mole aluminium phosphate. Hence, by ratio and proportion, 2 moles of each reactant will produce 6 moles potassium nitrate and 2 moles aluminium phosphate.