- Please help with 1 and 2. 9th grade math and I really need help.?

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Chemical reaction between running water and hydrochloric acid? Describe what an inverse function is, and explain how the derivative of an inverse function is related to the original function.? What is the name of the formula of the compound so3? What is the pH of a solution formed by mixing 50.00 mL of 0.2000 M H2SO4 with 60.06 mL of 0.333 M KOH? 9 batteries cost 20 dollars?