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Write the balanced chemical equation for the preparation of hydrogen and carbon dioxide gases by the reaction of water and methane gases. Caclulate the Enthalpy, Entropy, and Free Energy chang
A projectile is launched with an initial velocity of 300m/s at 55 degrees above the horizontal. What is the straight line distance from where the projectile was launched to where it was hit? What is
Use a sketch to show the change that occurs as a sulfur atombecomes a sulfide ion. Describe how the distance from the nucleus to the valence electrons changes as the sulfide ion forms and tell why
Several grams of an unknown liquid were added to a 156 mL Dumas bulb at 22 C and 740 torr. THe open bulb was then heated in a water bath to 98 C and kept there until all the liquid had boiled and it
A balloon contains mostly helium and a little methane, the partial pressure of helium is 101.2 kPa. If the pressure inside the balloon is 101.30 kPa, what is the partial pressure of the methane
A 0.10 M solution of lactic acid, a weak monoprotic acid of fromula HC3H5O3, was found to have a pH of2.43. What is the value of Ka for the acid?
Why nitromethane (ch3No2) have one double bond on oxgen... why not both oxygen have a double bond when writing the resonanace forms?
An aqueous solution has a vapor pressure of 81.7mmHg at50C . The vapor pressure of pure water at this temperature is92.6mmHg. What is the concentration of CaCl2 in mass percent?
Would it be possible to use non-metals and their ions to construct one or more of the electrodes or would some modification be required in the experimental stage?
What is the molarity of the acid? How many kilograms of sodium carbonate are needed to completelyneutralize the acid?
Polonium - 210 has a half life of 138.4 days, decaying by alpha emission. Suppose the helium gas originating from the alpha panicles in this decay were collected.
The pH of a calcium containing solution is adjusted by the addition of a few drops 0f 2M KOH and titrated with 0.01000M EDTA. If a10.00 ml aliquot of the Ca2+ containing solution requires 15.40
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?119g of .465 MKCl
What is the pH of a 0.015M HCl solution?If the pOH of a solution is 7.99, what is the [H+]?What is a conjugate acid/base pair?Solid calcuim hydroxide is dissolved in water until the pH ofthe solutio
How much energy is necessary to completely vaporize 75.0g of ice at 0 degrees Celsius? The molar heat of fusion for water is 6.02kJ/mol.
In the experiment, why do we add sodium hydroxide after converting bromoacetanilide to bromoaniline with acid? I would guess toneutralize the acid but what happens if we don't neutralize it?
Respective standard reduction potentials in volts for Fe(2+)and Ag+ are -0.44 and +0.80. Determine the value of E cell (involts) for a voltaic cell in which the overall reaction is Fe + 2Ag+ = Fe(2
Why do we have to parafilm or cover the beaker containing p-bromoaniline before we put it away for next lab? Is it so that itdoes not get oxidized by oxygen? If so, how?
The Al content ofthe solution after 2 months was 5.2μM. The total Al content ofthe glass, measured after completely dissolving some glass in 48wt% HF with microwave heating, was 0.80 wt%. What fr
59.0 mL of an unknown molarity of sodium hydroxide is combined with45.0 mL of 1.40 M magnesium chloride. What is the molarity of sodium hydroxide?
A 15m x 15m x 3.0m basement had a high radon content. On the day the basement was sealed off from its surroundings so that no exchange of air could take place, the partial pressure of222Rn was 1.2*1
Calculate the mole fraction of Kr and its concentration in partsper million by volume.( Kr composition % by volume is 0.00014)
Spattering does occur and some of the sample is lost onto the laboratory bench. Will the reported mole ratio of tin to oxygen be too high, too low, or unaffected? Explain.
Heat is added to 3kg of wet steam( a mixture of saturated liquid and saturated steam) contained in an isobaric ( constantpressure) system.
You dissolve 15.71 g of NH4NO3 in 150 mL of solution (callthis solution A). You take 20 mL of Solution A and add water untilthe total volume is 75.0 mL (call this Solution B). You take 15.0mL of sol