The crystal lattice structure of ionic compounds is responsible for which set of characteristic properties?
a.
electrically charged, good conductor of heat and electricity, low melting and boiling point
b.
good conductor of heat, ductile, malleable, high melting and boiling point
c.
found in many states at room temperature, low melting and boiling point
d.
liquid, flowing, alkaline, very low melting and boiling point
e.
solid, hard yet brittle, very high melting and boiling point

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.