- 1+cosx=2cos^2(x/2)?

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What mass of nitric acid, in grams, can be made from 551 g of ammonia? I have to convert 7 ft. to 6 in how i have to do? What is the electric potential at point P at the center of the square if the electric potential is zero at infinity? Use q, d and ε0? 18074W→17672Hf+? complete the equation as nuclear equation.? Taman atap?