In a similar Exp. 9 experiment, a calibration plot of absorbance vs. concentration of Red 40 dye (ppm) was obtained with the slope of the best-fit straight line as 0.038 ppm–1 The diluted unknown sports drink solution had an absorbance of 0.86. What is the concentration (ppm) of the Red 40 dye in the dilute unknown sports drink?

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

Who determined the nature of chemical bonds?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.