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I'm trying to find a compound that contains an alkaline earth metal and a polytomic ion and then finding its molar mass.? Could a black hole exist within the event horizon of a bigger black hole? A 25.0mL solution containing .60M HCl was titrated with 0.50M NaOH. Calculate the pH before the titration and at equivalence point? Differentiate(t) = (cos^3 t+ 3cost +7)^9? Help me to solve the following question!
Find integers x and y such that 57x+79y=17, and 400