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The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0 g of luminol to rm H_2O creating a solution with a total volume of 75.0 rm mL. What is the molarity of the stock solution of luminol? What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
The highly reactive OH radical (a species with an unpaired electron) is believed to be involved in some atmospheric processes. The bond enthalpy for the oxygen-to-hydrogen bond in OH as 460 kJ/mol. What is the longest wavelength (in nm) of radiati..
A new global sustainable business and industry incubator network is expanding into a Paris suburb. They want to make the newly acquired building and operations more environmentally friendly.
What are the boiling point and freezing point of a 2.47 m solution of naphthalene in benzene? (The boiling point and freezing point of benzene are 80.1°C and 5.5°C, respectively.
Draw the Lewis structure of the molecule, assuming that the Cl atoms bond to a single C atom and that there is a C -C bond and two C - O bonds in the compound.
A gas expands and does pv work on its surroundings equal to 347 J. At the same time, it absorbs 127J of heat from the surroundings, what is the change in energy of the gas.
A chemist wants to make 6.5 L of a 0.270 M solution. What mass in grams should the chemist use?
a 100 g sample of water at 23C is added to a 45 g sample of water at 99C. what is the final temperature of the sample
Glacial acetic acid is mixed with liquid methanol (nonaqueous). What type of organic reaction can this be characterized as?
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
find the molar mass of the unknown. 16.6 degrees C freezing point acetic acid and 3.90 degrees C*kg/mol?
Explain why the bond dissociation energy for the C-C sigma bond in propane is lower than the BDE for the C-C bond in propene.
a sample of nitrogen gas occupies 1.55 L at 27.0 C and 1.00 atm pressure. What will the volume be -100 C and the same pressure?
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