Which of the following is the smallest volume?
a) 22cm^3
b) 0.50 dl
c) 2.8 x 10^3 ml
d) 5.0 x 10^7 nl

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

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.