- CHEM HELP!!!!!! How many grams of Kr are in a 8.27 L cylinder at 27.0 °C and 8.67 atm?

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What is the pH of a 1.94×10-3 M solution of the strong acid HClO4? Does anyone by any chance have the answers to Lesson 10 Quadratic functions and equations unit test ? Unit 5? What is the percentage of the amount budgeted of 650 and the amount paid of 650? How many grams of hydrogen will be produced when 6.0 moles of oxygen are produced? Use proof by contradiction to prove that an even perfect square cannot have the form 4k+2.?