Given an HPLC linear calibration curve from which you have interpolated a betacarotine concentration of 205. μg/mL. Your mode of detection is UV/VIS at 425 nm. Your initial sample weight was 5.0502 g. And your initial dilution was 250. mL. Calculate the concentration of Betacarotine in ng/g in the sample.

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Asample of freon gas has a volume of 2.23 liters, a pressure of 4.85 kpa, and a temperature of -1.36°c. calculate the volume at a pressure of 1.38 kpa and a temperature of 5.5°c. (show work)