Hi, i have to write a lab report about an experiment i did where i had to find a relation between the solubility of a salt (nh4cl) and the solvent (a mix of water and methanol). i found that the higher the methanol concentration, the lower the solubility. the teacher explained why it happens in class (something about polarity) but i didn't quite understand. can you me ?

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

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.