Asample of pure no2 is heated to 339 ∘c at which temperature it partially dissociates according to the equation 2no2(g)⇌2no(g)+o2(g) at equilibrium the density of the gas mixture is 0.525 g/l at 0.750 atm .

In a copper wire, a temperature increase is the result of which of the following

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.

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l