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Can I take aspirin for chest pain even with a runny nose and I’m 16 years old? If 481 mL N2 was collected over water at 26.0 degrees Celsius and 745 torr, how many moles of N2 are present in this sample? Please help!? What is the phosphorus cycle? F(x)=((x+3)/(x-1)), evaluate (f(x)-f(1))/(x-1)? Find the sum of cos^2 x + cos^2 (x+1°) + cos^2 (x+2°) + ... + cos^2 (x+179°).?