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Using the hydrochloric acid a 5.00 mL sample of barium hydroxide is titrated to the phenolphthalein endpoint. The five mL sample needs 18.02 mL of 0.0873 M HCI solution to reach the endpoint.
What could you change about the experiment to resolve (separate) these two spots next time? Imagine that after developing the TLC plate, you see that two result spots (from the same solution) are ov
The combustion of butane produces heat according to the equation: Determine the heat of combustion per gram of butane.
Explain how could you use a precipitation reaction to separate each of the following pairs of cations? Write down the formula for each reactant you would add, and write down a balanced net ionic equ
A 250.0-gram sample of a white solid is known to be a mixture of BaCl2, KNO3, and NaCl. When 100.0 g of this mixture is dissolved in the water and allowed to react with excess H2SO4
How can identify the substance oxidized and the substance reduced? Find out the oxidizing agent and the reducing agent.
The half-life of H2O2 at 298 K was found to be 0.41 s, while that at 1000 K was 0.07 s. estimates the Arrhenius activation energy
Assume that quality control at an aspirin manufacturing plant fell down on the job and left some aspirin tablets to be sold that contained salicylic acid, explain what might happen to perso
An aqueous stock solution ("S") which is having 8.657 mg of gallium (Ga) per mL of solution is diluted in the following manner. A 3.00 mL aliquot of this solution is added to a 150.00 mL volumetric
A gas-filled balloon having a volume of 3.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere, where the pressure and temperature are 3.00 x10-3 atm, -23°C resp
Determine the delta E for this reaction? Suppose the reaction goes to completion. If 3 moles of H2 react with 3 moles of Cl2 to form HCl, determine the work done (in joules) against a pressure of 1.
Give brief but clear explanations for the observed conductivities for parts c, d, and e on the basis of your net ionic equations.
A 10 L box contains a 41.4 g mixture of gases CxH12 and CxH8. The total pressure at 44oC in the flask is 1.56 atm. Analysis revealed that the gas mixture has 87% total C and 13% total H. Identify the
A gram of Calcium Carbonate (CaCO3) decomposes into carbon dioxide gas (CO2) and calcium oxide (CaO) in the test tube when heated :
The combustion of butane forms the heat according to the equation: Determine the heat of combustion per gram of butane.
The axial alcohols oxidize somewhat faster than the equatorial alcohols. Which would you expect to oxidize faster, trans-4-tert-butylcyclohexanol or cis-4-tert-butylcyclohexanol? Illustrate
The percents of fish that survived are recorded in the table. The water in a fishery became polluted when toxic waste was dumped into its pond, causing the fish population to substantially decline.
Identify the theoretical yield for the bromination of both cinnamic acid and stilbenes, assuming the presence of excess pyridinium tri bromide.
The microwave radiation is absorbed by moisture in the food. Microwaves are used to heat food in microwave ovens. This heats the water, and, as the water becomes hot so does the food.
Hydrogen is burning at the rate of 0.44 mol/s. Determine the rate of consumption of oxygen? = .22 mol/s. Determine the rate of formation of water vapor?
The combustion of acetylene gas is represented by this equation:Determine how many grams of CO2 and grams of H2O are produced when 52.0 g C2H2 burns in oxygen?
The combustion of what volume of ethane (C2H6) measured at 23.0 degree C and 752 mmHg, would be needed to heat 855g of water from 25.0 degree C to 98.0 degree C?
The molecular formula, C4H10O whose proton NMR spectrum contains a downfield quartet and an up field triplet with relative integration 2:3.
In the presence of light and heat the Methylcyclohexane reacts with molecular bromine (Br2). The major product obtained from this reaction is reacted with sodium ethoxide in the ethanol at 55°C.
Illustrate the skeletal structure of the compound whose structure would be consistent with the following information. The molecular formula C5H12O whose proton NMR spectrum contains a septet