Radiocarbon dating can be used to determine the age of
a a sample less than a million years old
b a sample less than 100,000 years old
c a sample less than 50,000 years old
- d a sample less than five million years old

What diagram shows the ionic compound of magnesium oxide

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

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.