A 250 mL solution of barium hydroxide found to have a pH of 12.450. What mass of barium hydroxide is dissolved in this solution?

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n