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1)A coffee cup calorimeter was used for the neutralization reaction of 100 mL of 1.00 M hydrochloric acid with 100 mL of 1.20 M sodium hydroxide. The initial temperature was 22.88 °C and the final temperature was 29.39 °C. Calculate the calorimeter constant for the reaction. HCl (aq) + NaOH (aq) NaCl (aq) + H2O (?H°rxn = -58.3 kJ/mol)2)The same calorimeter was used for the dissolution of 8.86 g sample of lithium chloride in 100.0 mL of water at 22.2 °C. When the salt was dissolved, the temperature of the solution was 39.5°C. Calculate the molar enthalpy of solution of lithium chloride. Is the dissolution of lithium chloride endothermic or exothermic? [The density of water is 1.0 g/mL.]
Iodine-131 decays to produce xenon-131. Which type of nuclear radiation is emitted in this reaction
Consider the gases CH4, O2, and CO2, all at the same temperature. Arrange the gases in order of increasing average molecular speed. How does the average EK of the gases compare
Which of the following describes what happens to the solubility of a slightly soluble ionic compound when a common ion is added to the solution
the density of an aqueous ethanol solution is .789 g/mol. How many grams of ethanol should be mixed with water to make 225mL to make a 4.5% ethanol solution?
The volume of a manifold used to transfer gases is calibrated using Boyle's Law. A 0.251-dm3 flask at pressure of 697 Torr is attached and after system pumpdown,
Given that benzaldehyde is a meta- director, draw all three resonance structures for the carbocation intermediate that results from STEP 2 in the electrophilic aromatic substitution reaction when benzaldehyde reacts
Describe the major organic product(s) of this reaction. CH3C?CD + CH4 or CH3C?CCD or CH3C?CCH3 or CH3C?CD + CH3D or CD3C?CD3
A given compound has the following solubility properties. At room temperature, it is souble in diethyl ehter but insoluble in both ethanol and water At high temperatures,
Initially a mixture contains 0.601 mol each of N2 and O2 in an 7.65-L vessel. Find the composition of the mixture when equilibrium is reached at 3900°C. For the reaction below, the Kc = 0.0123 at 3900°C. N2(g) + O2(g) 2 NO(g)
If the maximum amount of product possible is formed in the following reactions, what mass of the specified product would you obtain
A voltaic cell consists of a half-cell and a half-cell at 25 . The initial concentrations of and are 5.10×10-2 and 1.40 , respectively.
using a sample of hard water contains 121 mg of calcium carbonate per liter of h2o. suppose the reaction goes to
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