Lewis structure for carbon tetrabromide (cbrá), in which a central carbon atom is bound to four atoms of the group 7a element bromine?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Which of the following units is not an official si unit? mole liter kilogram ampere

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.