Define and explain London dispersion forces

4- nitro benzaldehyde is limiting reagent. Calculate the percent yield

What will happen If you add two drops of nonpolar red dye to a 2 mL cyclohexane solution? * a red homogenous solution will form a red heterogenous solution will form the color of solution will change from red to colorless the solution will still remain colorless

What is the reactant in the following reaction? Mg ether MgBr

You grab a soft drink bottle from your refrigerator. The contents are liquid and remain liquid even when shaken. You now remove the cover, and the liquid solidifies. Provide an explanation for this finding.

List all the chemicals you are going to use or encounter from the experiment of  Le Chatelier’s Principle?  What materials that have specific hazards or safety concerns? Then list out the glassware, tools, equipment and other materials you think you are going to need for the experiment of  Le Chatelier’s Principle?

Here is a graph of the molarity of acetonitrile (CH, CN) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table below. у 0.30- 0.25- 0.224 0.20 M 0.15– 0.10- 0.05 50 100 150 200 250 300 seconds

A bottle containing both NaCl(s) and NaCl(aq) is shaken repeatedly over a period of several weeks. The mass of NaCl(s) on the bottom of the bottle remains constant. What statement explains the final appearance of the mixture? a) dissolving and crystallization are occurring at the same rate b) dissolving has stopped completely c) the gas pressure in the sealed bottle prevents dissolving d) the water molecules have stopped moving

Part C A solid mixture consists of 32.3 g of KNO3 (potassium nitrate) and 5.7 g of K2SO4 (potassium sulfate). The mixture is added to 130. g of water. If the solution described in the introduction is cooled to 0 °C what mass of K2SO4 will crystallize? Use this solubility curve (Figure 1) to answer the questions. Enter your answer numerically in grams. • View Available Hint(s) Nνα ΑΣφ ? Figure Submit

how to separate a solid mixture of lithium bromide and barium carbonate

Determine Kc for the reaction 1/2 N2(g) +1/2 O2(g) +1/2 Br2(g) =>NOBr (g) From the following information. 2 NO(g) => N2(g)+O2 (g)  Kc=2.1x10^30 NO(g) +1/2Br2(g)=> NOBr(g) Kc=1.4

Sam drops a sugar cube into a jar with hot water and a sugar cube into a jar with cold water. Both jars have the same volume of water. He drops the sugar cubes at the same time and then observes how much of them dissolves in two minutes. What will be the result of Sam’s experiment, and which statement should he use as his conclusion? A A greater amount of sugar dissolved in hot water because temperature is directly proportional to the solubility rate of sugar in water.   B Temperature does not affect the solubility rate of the sugar cube in water because sugar dissolves equally in both cold and hot water.   C A greater amount of sugar dissolved in hot water because temperature is inversely proportional to the solubility rate of sugar in water.   D A smaller amount of sugar dissolved in cold water because temperature is inversely proportional to the solubility rate of sugar in water.

The reaction below requires several mechanistic steps. Six different intermediates are shown below...some are involved in the mechanism and some are not. Your job is to pick the correct intermediates and put them in the correct order. Your answer should be formatted using the number of the first intermediate, followed by the number of the second intermediate, followed by the number of the third intermediate, etc., until you have selected the correct intermediates and placed them in the correct order for the mechanism. An example of the correct answer format would be 231 if you thought intermediate #2 should come first, followed by intermediate #3, and then lastly, intermediate #1. Again, not all of the intermediates are included in this mechanism, so it might be a good idea to try to work it out first on your scratch paper. Do not add any spaces in your answer. 8 4 HO "20 96 5 ***** HCI CH₂Cl₂ (solvent) 1 !! 6 8 hp 7 2

Based on the following boiling point information, what compound has the weakest intermolecular force? Substance Boiling Point Acetaldehyde CH₃CHO 20.8 Heptane 98.4 Cyclohexane 80.7 Ethanol 79 Hexane 68.7   Acetaldehyde Heptane Cyclohexane Ethanol Hexane

True or False: Water is considered a chemical element.