A 0.1014-gram sample of a purified CHO compound was burned in a combustion apparatus and produced 0.1486 grams of CO2 and 0.0609 grams of H2O. Mass spectrometry analysis revealed that the compound had a molar mass of 180 g/mol. What is the molecular formula for this compound?

What element breaks down into yttrium-90?

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.