Magnesium reacts with sodium fluoride to produce magnesium fluoride and elemental sodium. Cu + AgNO3=Ag + CuNO3

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.

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring

Which example is a mechanical wave?     a.microwave    b.radio wave    c.water wave    d.ultraviolet light