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Determine the boiling point of a solution that contains 78.8g of napthalene c10h8 molar mass 128.16 g/mol dissolve in 722 mL of benzene (d = 0.877 g/mol. pure benzene has a boiling point of 80.1*C and a boiling point elevation constant of 2.53*C/m
consider two cells the first with al and ag electrodes and the second with zn and ni electrodes each in appropriate
consider the decomposition of ammonium chloride at a certain temperature.nh4cls nh3g hclgcalculate the equilibrium
oxidation of nh3yields nitric oxide no and the reaction is represented by the equation 4nh3 5o2 --gt 4no 6h2o.
The procedure uses 3.0M NaOH. However, the student notices that the only solution of NaOH is concentrated (19M ) NaOH solution. How many mL of water are needed to make 500mL of a 3.0M NaOH
Draw all the structural isomers for the molecular formula C4H9Br. Be careful not to draw any structures by crossing one line over another; the system needs to know where you intend connections to be between atoms. I came up with 4 different struct..
Consider a rigid, adiabatic, impermeable cylinder (i.e., a closed isolated system) that consists of two chambers (i.e., simple systems) that are separated by a wall that is permeable
carbon dioxide was allowed to effuse through a small opening under constant pressure conditions. It required 683 s for 1.00 L of this gas to effuse. Calculate the effusion time of ozone (O3) under identical experimental conditions
We prepare a buffer by adding 0.4640 mol HNO3 to 0.5528 L of a solution containing 2.061 M trimethylamine [(CH3)3N, Kb = 6.500x10-5]. What is the pH of this buffer
Caffeine is made up of 49.5% C, 5.2% H, 16.5%O, and 28.9% N. A solution made up of 8.25g of caffeine and 100.0 of benzene (d=0.887g/ml) freezes at 3.03C.
A titration was performed with a solution of 10.00 mL of Ca(OH)2 and 25.00mL of DI water. The endpoint was reached with a 0.03192 M of HCl at a final volume of 11.25 mL.
Draw all products of the reactions of 4-Chloro-2-methylpentane with NaCN and AgCN. Identify the reaction mechanisms and draw resonance structures
Compare the absorbances you obtained for the SPF 8 and SPF 15 preparations. If both preparations contain the same ingredients, how much must the concentration of UV-absorbing materials
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