Which statement describes compounds? A) Compounds are made of one type of atom.
B) Compounds cannot be represented by models.
C) Compounds are represented by chemical formulas.
D)Compounds cannot be broken down into simpler forms.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

One does not belong why? ice, gold ,wood ,diamond and table salt

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.