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Calculate the pH of 5.2x10^-4 M HNO3? Find the area under the standard normal curve to the right of z = 1? If I am given a graph of F'(x). How can I use this to find the critical values of F(x)? In a certain experiment 100 grams of ammonia produces 120 grams of urea. Determine the percent yield for thiis reaction.? What is the number of atoms in NaCl?