The fluorescence of a CFP solution is quenched with a 30 mM solution of YFP, where the observed fluorescent lifetime is 0.5 s and the quenching rate is 43.0 M-1 s-1. Use the Stern-Volmer equation to find the ratio of non-quenched to quenched fluorescence, and then use the inverse of this ratio to calculate the percentage change in fluorescence upon quenching.

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

What is the empirical formula for c4h8o2