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.

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Can someone me with questions 15 to 17 plz.

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?