Consider the hypothetical reaction A + 2B → 3C + 4D Over an interval of 2.50 s the average rate of change of the concentration of C was measured to be 0.0620 M/s. What is the final concentration of B at the end of this same interval if its concentration was initially 1.700 M?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

The time that is taken by neptune once around the sun is called