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A molecule of unknown structure has a molecular formula of C9H8O2. In the infrared spectrum there are absorptions at 1761, 1145 and 761 cm-1. In the 13C NMR spectrum there are absorptions at? 168.4, 152.0, 128.2, 128.0, 124.3, 122.8, 116.8, 29.1 and 23.6.
Explain the volume of carbon monoxide gas (CO) collected over water at 25 C was 680 c3 with a total pressure of 752mmHg. The vapor pressure of water at 25 C is 23.8 mmHg. Find out the partial pressure and mole fraction of CO in the container
a student observed after an experimentnbsp that a gas sample of 250-mlnbsp has a mass of 0.243 g atnbsp a temperature
How to illustrate a 3-D structure from a Newman projection. as well, each atom how to know if to put the atom on top bottom, wedged or dashed
The next question was this: "What is the PH at it's equivalence point? AS part of your answer, define equivalence point. What does it mean for a substance to be at its equivalence point?"
During a strenous workout, an athlete generates 1890.0 kj of heat energy. What mass of water would have to evaporate from the athlete's skin to dissipate this much heat?
How many grams of NaCl are needed to prepare 250 mL of an isotonic saline solution with a concentration of .90% , assuming a solution density of 1.0g/mL
hard candy is made from very hot solutions of sugar and water with small amounts of added flavorings. in a typical
In photosynthesis, plants form glucose and oxygen from carbon dioxide and water. calculate delta H, delta S and delta G of the reaction. Delta H is 2800.
Calculate the root mean square velocity of the CH4 molecules in a sample of CH4 gas at 281 K and at 533 K.
Calculate the pH of a 1.00 L solution which is made up of 0.046 mol acetic acid and 0.026 mol sodium acetate.
If every tablet in the problem abouveweights 650 mg. How many kilograms of excipient (lactose/talcum powder/filler) are needed to complete the whole batch?
What mass of melamine, C3N3(NH2)3 will be obtained from 178.5 kg of urea, Co(NH2)2 if the yield overall reaction is 83%
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