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A 400.0 g metal bar requires 6.446 kJ of energy to change its temperature from 18.0 ºC to 95.0 ºC. What is the specific heat of the metal
A sample of 30.0 ml of krypton gas, Kr, is at 756 mm Hg and 25.0 degree celsius. What is the new volume if the pressure is decreased to 325 mm Hg and the temperature is decreased to -12.5 degree celsius?
A 80.0 mL stock solution contains 5.00 M BaCl2. When 25.0 mL of the stock solution is diluted to 75.0 mL, how many moles of Ba2+ ions will be contained.
Calculate the pH of a solution formed by mixing 10.0 mL of 0.100 M HBr with 20.0 mL of 0.200 M HCl.
Compound A reacts with water to give dimethylmalonic acid and with methanol to give the monomethyl ester of the same acid. (Compound A was unknown until its preparation in 1978 by chemists at the University of California, San Diego.)
If you are titrating 25.00 mL of a 1.00 mg/mL CaCO3 solution, how many mL of 0.010 M EDTA solution will be required to reach the equivalence point
The hardness of a water sample is known to be 500 ppm? CaCO3. In an analysis of a 50 mL water sample, what volume of 0.0100 M Na2H2Y is needed to reach the endpoint
A certain metal crystallizes in a face-centered cubic arrangement. If it rearranges to a simple cubic structure, what will happen to the density of the metal
Problem- The enzyme succinoxidase catalyzes the oxidation of succinate. At 40 degrees the rate of this reaction is 4.83 times as fast as it is at 20 degrees. Determine the activation energy of this reaction.
Outline the procedure for calibration of a light microscope, The procedure of focusing in light microscope, Explain four factors ways of obtaining maximum amount of resolution in bright field microscope
How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for 10.0 hours
A compound with the formula C15H14O has a strong peak near 1720 cm-1 in the IR. The 1H-NMR spectrum shows a 3H singlet at 2.20, a 1H singlet at 5.08 and a 10H multiplet at 7.25 Draw the compound.
A 50.0-mL solution of 0.031 9 M benzylamine was titrated with 0.050 0 M HCl. Calculate the pH at the following volumes of added acid: Va = 0, 12.0, 30.0,0.5 Ve, Ve, and 35.0 mL.
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