Fertilizer is made by mixing equal masses of potassium nitrate (KNO3) and ammonium phosphate ((NH4)3PO4). What is the mass fraction of phosphorus in this formula? I've been trying to solve this for 15 minutes, and I feel like I'm missing something obvious.
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You have equal masses of KNO3 and (NH4)PO4
Consider (NH4)3PO4 N + 14, H = 1 P = 31 O = 16 = 14 x 3 + 1 x 12 + 31 + 64 = 149
Mass fraction of phosphorus is 31/149 = 0.208.
This is then "diluted" with an equal mass of KNO3 so the final mass fraction is 0.104 or 10.4%
Consider (NH4)3PO4 N + 14, H = 1 P = 31 O = 16 = 14 x 3 + 1 x 12 + 31 + 64 = 149
Mass fraction of phosphorus is 31/149 = 0.208.
This is then "diluted" with an equal mass of KNO3 so the final mass fraction is 0.104 or 10.4%