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A 2.012 g sample of a compound of nitrogen and oxygen has 0.522g of nitrogen. Calculate its empirical formula.? Kidney transplantation subspeciatisty? I made a typo earlier, excuse me. I still don’t understand how to do this. Find b such that f(x)=-4(x^2)+bx+3 has a maximum value of 50? What is ∞^0? What is 0∞? If an object with a mass of 35 grams has a volume of 70cm cubed and its length is 40cm, what is the density of the object?