Draw Lewis structures for the molecules below. Draw resonance structures where appropriate and label any formal charges. Calculate the bond orders. 1) [SCN]- 2) [HC2O4]- 3) SNF3 4) [S2CO]2- 5) [IO3]- 6) [SO4]2- 7) [S3N3]- (cyclic, every other atom is S) 8) [ClO4]- 9) [NO2]- 10) N2O 11) [ClO4]-

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.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(s o4)2·7h2omgso4·7h2o