Chemistry Questions and Answers March 04, 2020

What class of organic compound with more than five carbon atoms is insoluble in water but readily dissolves in 6 M NaOH

Complete the following equations a. CH,COOH H,O2 b. CHCHNH, 2 c. CH,CH,CH,CH,CH,CH,COOH NAOH d. cH, c NaOH

Suppose an unknown organic compound formed a precipitate when treated with ethanoic silver nitrate, which was soluble in dilute nitric acid. In which functional class would the compound belong

Suppose an unknown organic compound gives a positive test with 2,4dinitrophenylhydrazine. Why would you want to follow up that positive test with the Tollens test

How many liters of gas will be in the closed reaction flask when 36.0L of ethane (C2H6) is allowed to react with 105.0L of oxygen (under constant pressure and temperature) to form carbon dioxide gas and water vapor? Assume ideal gas behavior. The balanced equation for the reaction is 2C 2 H 6 (g)+7O2(g)4CO 2 (g)+6H 2 O(g)

Consider the fluorescence spectra image below. Assuming a linear relationship is preserved between signal intensity and concentration, estimate in micromolar units the lower limit concentration that would result in a S/N ratio of 5.0. Estimate the noise level to be 0.01 intensity units. Report your answer with only 2 decimal places.

Fluorescence 500 nm (Rel.) 1.0 0.8 0.6 0.4 0.2 0.0 Fluorescence of Fluorescein and Phenolphthalein 500 Peak for Fluorescein at 515 nm 700 Wavelength (nm) Fluorescein (1ppm) Fluorescence 500 nm Phenolphthalein (1ppm) Fluorescence 500 nm 900

Consider the following reaction: 3 NO 2 (g) + H 2 O (l) 2 HNO 3 (l) + NO (g) How many moles of NO 2 (g) are required to react with 1.50 moles of water to produce 4.00 moles of nitric acid?