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Although the use of absorbances at 450 nm provided you with maximum sensitivity, the absorbaces at, say, 400 nm or 500 nm are not zero and could have been used throughout this experiment. would the same value of K be obtained at one of these wavelengths?
A 90.0 g piece of hot iron is placed in a calorimeter containing 125 mL water at 19.8 degrees celcius. If the final temperature of both the water and the iron is 24.6 degrees celcius, what is the initial temperature of the hot iron?
If you dissolve 4 aspirin tablets in a 340mL glass of water, what is the pH of the solution and the percent dissociation?
The mass of a cube of iron is 363 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 15.0 fluid ounce drink from 71°F to 32°F, if the heat capacity of the drink is 4.18 J/g·°C?
The enthalpy of combustion of benzoic acid (C6H5COOH) which is often used as the standard for calibratie constant-volume bomb calorimeter; its value has been accurately determined to be 3226.7 kJ/mol.
When 50 grams of iron absorbs 1.0 kJ of heat its temperature increases by forty degrees celsius. What is the molar heat capacity of iron?
Determine the molarity of the NaOH(sodium hydroxide) solution. In an acid-base titration, 22.13 mL of a sodium hydroxide solution are required to neutralize 24.65 mL of the potassium hydrogen phthalate solution?
Propose a structure for C4H9N, which does not liberate a gas when treated with NaNO2 and HCL, and has IR absorptions at 917, 990, and 1640, as well as an N-H absorption at 3300. The 13C NMR spectrum is as follows
A buffer solution is composed of 1.360 g of KH2PO4 and 5.677 g of Na2HPO4. What is the pH of the buffer solution?
Write the electron configuration of the atom in the third row of the periodic table that has the smallest E_{{rm{i}}4}.
Find pH of A mixture formed by adding 44.0 mL of 2.5×10-2M HCl to 150mL of 1.5×10-2 M HI.
if 6.73 g of Na2CO3 is dissolved in enough water to make 250 ml of solution, what is the molarity of the sodiam carbonate?
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