(c) During the recrystallization step, Bailey sets her flask with crude vanillyl alcohol and flask with ethyl acetate on the hot plate and begins heating. She waits until the ethyl acetate is boiling and recrystallizes her product. Later, she notices that her product looks different than her peers. She also recovered little vanillyl alcohol. i. Identify the error that Bailey made with recrystallization that caused these ending discrepancies. In this experiment, name one technique of recrystallization that can result in a larger vanillyl alcohol yield. (Hint: Minimizing solvent is not an answer)

20.5)

(a) True or false Chemical warfare is a natural disaster.   (b) True or false An organizations vision will speak to how the mission will be implemented.   (c)  true or false The Mission of an organization will contain the moving forward direction the organizations policy interests will take  (d). True or false The situational analysis of a health care policy development stage will identify each stakeholder and informs the policy decider on possible paths for the policy.

Write out the sequence of reactions of the Chapman cycle and explain what is happening in each reaction.

The main chemical reaction of biodiesel production usually carried out at a temperature higher than room temperature with continuous stirring. False True

1) a balanced chemical  equation (molecular equation), (2) a total ionic equation, and (3) a net ionic equation for the  reactions below. Include the appropriate phase for each species. Do your experimental  observations match your predictions?    (g) Mg(NO3)2(aq) + Na2CO3(aq) →

b) 1) 03 2) (CH3)2S 0$04 4 (or KMnO4 dil.)

Esc ||| = OTHERMOCHEMISTRY A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at right). Calculating heat of reaction from bomb calorimetry data First, a 5.000 g tablet of benzoic acid (C6H,CO₂H) is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from 16.00 °C to 38.96 °C over a time of 9.2 minutes. 2 4. Next, 5.730 g of acetaldehyde (C₂H₂O) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 16.00 °C to 42.19 °C. 84°F Sunny Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: FI Explanation Is this reaction exothermic, endothermic, or neither? 4- F₂ Check 2C₂H4O(g) + 50₂(g) 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are…