True or False The Earth systems are interconnected with each other and greatly influence climate, natural processes, and other conditions on the planet

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

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.