PA 1. What is the pH of a 0.0004 M of hydrogen solution? Acid or base?
-log(0.0004)= 3.4 pH this is lower than 7 making it an acid

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

Identify a strong intermolecular force of attraction between an alcohol

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.