What type of model is shown?
There are several different models that represent
compounds. One type of model is shown.
O
o
O
O
a structural formula
a chemical formula
a space-filling model
a ball-and-stick model
HHH
H-C-C-C-41
HHH

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Based on its chemical properties, identify the position of each chemical family on the periodic table.

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.