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50 mL of water at 46.9 C were mixed with 50 mL of water at 25.1 C in a calorimeter also at 25.1 C the final temperature was 30.1 C. Assuming that neither the density of water nor its specific heat capacity change with temperature, calculate the total heat capacity of the calorimeter. (density of water = 1.00 g/ mL , specific heat capacity = 4.18 J g-1 K-1)
Give three reasons why spectrophotometric analyses are performed using a narrow wavelength band centered at ? max. Give the purpose of the following commands:
A 0.6815g sample of alum is heated to drive off the waters of hydration, and the resulting KAL(SO4)2 weighs 0.3709 g. Determine the value of x AND the complete formula of alum.
Illustrate this by showing the reaction of trans-p-anisalacetophenone with bromine and 2,4-dinitrophenylhydrazine to give the corresponding products
A student dissolves 1.50g of copper(II) nitrate in water. After adding aqueous sodium carbonate solution which contains 1.80g of sodium carbonate, the student obtains 0.875g of CuCO3 precipitate.
make a stock solution of D2O/DMSO. How can I go about using serial dilutions from stock solution in order to get 1 microliter of DMSO?
4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) In a certain experiment, 4.30 g of NH3 reacts with 7.48 g of O2. Which is the limiting reactant?
Explain the following given for each statement in determining the sequence of peptide with concise (short) but complete response. you must state the specificity of each statement implication in determining the sequence of octapeptide.
A buffer contains 0.15 mol of propionic acid C2H5COOH and 0.13 mol of sodium propionate C_2 H_5 COONa in 1.20 L.
From the first and second laws of thermodynamics, derive the equation for the criterion of spontaneity of a process, Gibbs free energy,
What volume of O2 at 988 mm Hg and 33 degrees celcius is required to synthesize 19.5 moles of NO2.
When you heat baking soda (NaHCO3), it breaks down into sodium carbonate powder (Na2CO3), carbon dioxide and water vapor. Write a correct thermo chemical equation and explain what it tells you about the reaction ( The enthalpy of this reaction is ..
If a water sample has a phosphate concentration of 2.0 x 10-6 M, at what calcium ion level will a precipitate of Ca3(PO4)2 begin to form if the Ksp = 1 x 10-25
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