A solution of the weak acid HA is prepared by dissolving 2.40 g of HA in 100.0 mL water. The solution is titrated, and the equivalence point is reached after 33.3 mL of 0.500 M NaOH is dispensed. Calculate the molar mass of HA. molar mass: g/mol At the equivalence point in this titration, how can the solution pH be described

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.

In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3