The net ionic equation for formation of an aqueous solution of NiI2 accompanied by evolution of CO2 gas via mixing solid NiCO3 and aqueous hydriodic acid is .A) 2NiCO3 (s) + HI (aq) ® 2H2O (l) + CO2 (g) + 2Ni2+ (aq)B) NiCO3 (s) + I- (aq) ® 2H2O (l) + CO2 (g) + Ni2+ (aq) + HI (aq)C) NiCO3 (s) + 2H+ (aq) ® H2O (l) + CO2 (g) + Ni2+ (aq)D) NiCO3 (s) + 2HI (aq) ® 2H2O (l) + CO2 (g) + NiI2 (aq)E) NiCO3 (s) + 2HI (aq) ® H2O (l) + CO2 (g) + Ni2+ (aq) + 2I- (aq)

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.

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?