Which describes the basis of an immunoassay? An electron beam excites atoms within the drug, which give off a characteristic
X-ray spectrum.
The drug gets carried through a stationary phase by a mobile phase and the
retention time identifies the drug.
The unknown amount of drug in a sample competes with a known amount of
fluorescently labeled drug for binding to an antibody to that drug.
The drug fragments have specific molecular weights that bind to the antibodies.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

fe 55.85 g/mol and h2o 18.02 g/mol.

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.