2(5) b) Explain the following:
i) Ethanol is completely miscible with water
ii) H20 boils at 100° C while H2S boils at -58° C.

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

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.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?