A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0 point 2 6 atm and 0 point 2 8 atm, respectively. If the total pressure is 0 point 9 0 atm, what is the partial pressure of ammonia? Use cap p sub cap t is equal to cap p sub 1 plus cap p sub 2 plus cap p sub 3 plus dot dot dot plus cap p sub n