2. Potassium is a metal with one valence electron. With which other elements does it form bonds? a elements with one electron b. elements with two electrons c. elements with five electrons d. elements with seven electrons

How can you use chemical equations to predict the products of the reaction you can carry out?

Which position represents spring in the southern hemisphere? a) b) c) d)

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.