When sodium is put in water, it quickly reacts according to the following equation: 2 na (s) + 2h_2o (ii) > 2naoh (aq) + h_2 (g)
if 4.52 moles of na react with an excess of water, how many grams of h_2 are formed?

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

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.