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A) In this experiment, it is important that the benzaldehyde used should be pure. Benzaldehyde is easily oxidized by air and produces a white crystalline material. What is the name of this oxidation product?
B) What safety precautions should you take when working with sodium hydroxide solutions?
Calculate the electron affinity in kJ/mol for X in the hypothetical ionic compound MX from the information given below.
How many grams of FeSO4.(NH4)2SO4.6H2O (MW = 392.14) must be dissolved and diluted to 250.0 mL to prepare an aqueous solution that is 10.00 ppm Fe2+ by weight (1.00 ppm = 1.00 mg/L)
If you added 0.02 mol of X and 0.01 mol of Y to form 100g of the solution 2X(aq)+Y(l) = X2Y(aq), how many moles of X and Y would you need to bring about the temperature change of 21C to 51C?
Sketch the reaction profile for an exothermic reaction of 25 kJ/mol with an activation energy of 55 kJ/mol. (Be sure to label the transition state on the diagram and include quantitative data.)
Predict whether the benzoin condensation would work with 4-tolualdehyde, 4- trifluoromethylbenzaldehyde, and 4-N ethylaminobenzaldehyde. Draw the structure of any products that are formed.
A 10.0 mL sample of aqueous HCl requires 24.32 mL of 0.134 M NaOH to reach the endpoint. What is the molar concentration of HCl. The equation for the reaction is:
Calculate the concentrations of all species in a 0.225 M solution of phenylammonium chloride, C6H5NH3Cl.
When gasoline burns in a car engine, the heat released pushes the pistons outward. If the expanding gases do 451 J of work on the pistons and the system loses 325 J to the surroundings as heat, calculate the change in energy.
a sample of steam with a mass of 0.550 g and at a temperature of 100c condenses into an insulated container holding
Draw the lewis structure of CH3NCS including all resonance forms. Assign formal charges.
Suppose that 0.35 mol of hydrogen gas and 0.35 mol of clorine gas are placed in a 1L reaction vessel at a certain temperature, and the following reaction comes to equilibrium
What volume of an organic solvent must be used to effect 90% seperation in one extraction when only 2.7 g of a certain compound dissolves 100 ml of water? (K=15).
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