Get college assignment help at uniessay writers Calculate the amount of work done, in joules, when 2.5 mole of H2O vaporizes at 1.0 atm and 25°C. Assume the volume of liquid H2O is negligible compared to that of vapor. [1 L·atm = 101.3 J]
can you please help me with 17 and 18?
if we combine 1 mol of k3(RhCl6) with 1 mol K2C2O4 which compound is the limiting reagent?
aufbau diagram of krypton
2 C8H18(l) 25 O2(g) → 16 CO2(g) 18 H2O(l) Octane has a density of 0.692 g/mL at 20°C. How many grams of O2 are required to burn 8.10 gal of C8H18?
Calculate the pH of a solution prepared by dissolving 0.75 mol of NH3 and 0.25 mol of NH4Cl in water sufficient to yield 1.00 L of solution. The Kb of ammonia is 1.8 x 10-4
A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stabilizes at a height of 729 mm above the pool of mercury. What is the pressure of the atmosphere?
A closed container was filled with CO2 gas at 2 atm and 27°C. The container was then heated to 177°C. The resulting pressure in the container would be
Ethanol, C2H5OH is mixed with gasoline and sold as gasohol. Use the following to calculate the grams of ehanol needed to provide 293 kJ of heat. C2H5OH 3O2 —-> 2CO2 3H2O Delta H = -1235 kJ How do I do this question
A solution is made by mixing 8.00 (millimoles) of and 1.00 of the strong base. What is the resulting pH? More strong base is added until the equivalence point is reached. What is the pH of this solution at the equivalence point if the total volume is 42.0 ?
Get college assignment help at uniessay writers A person ate 0.50 pounds of cheese (an energy intake of 4000 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to vaporize 1 mol of water.)
2h2so total number is?
Question part Points Submissions 1 0/10 0/6 Total 0/10 Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction. 2 NaN3(s) 2 Na(s) 3 N2(g) What mass of NaN3(s) must be reacted in order to inflate an air bag to 61.8 L at STP?
how much potassium chlorate in needed to produce 20.0mL of oxygen gas at 670mm Hg and 20 degrees celcius?
What is the percent yield if 0.85 g of aspirin is formed in the reaction of 1.00 g of salicylic acid with excess acetic anhydride?
In general, experimentally determined pKa1 values tend to deviate more from the reproted pKa1 values than experimentally determined pKa2 deviate from the reproted pKa2 values. Give a possible reason for this.
When titrating a diprotic acid with a strong base, we want to calculate molar mass of a diprotic acid. a) If the pH meter is calibrated to read a higher value than the actual one, then would the calculated molar mass of diprotic acid be higher/lower/no change than the accepted molar mass value. b) If water left in the buret is subsequently used to dispense standardized NaOH, then would the calculated molar mass of diprotic acid be higher/lower/no change than the accepted molar mass value.
What is the molar concentration of Br^-1 ions in a 0.245 aqueous solution of FeBr3 , assuming complete dissociation?
(d) Draw the skeletal structure of major organic product C. (Assume the acid is dilute aqueous acid.) http://www.webassign.net/ksorgchem2/221-24-003.jpg
A substance has the properties given below. How much heat, in kJ, would be required to convert 35.0g of this substance from a liquid at 15.0 ºC to a gas at 87.0 ºC? (there is some extraneous information given) Molar Mass = 198.25 g/mol mp = –12.5 ºC ΔHfus = 5.81 kJ/mol bp = 58.0 ºC ΔHvap = 39.4 kJ/mol cliquid = 1.59 J/gºC csolid = 1.18 J/gºC cgas = 2.91 J/gºC 2. Given the reaction of P4 (s) 6 Cl2 (g) → 4 PCl3 (g) , ΔHrxn = –1225 kJ a. How much heat energy is released if 4 mole of PCl3 (g) is formed? b. How much heat energy is released if 2 mole of PCl3 (g) is formed? c. How
1)How much 0.200M NaOH (in ml) do you need to add to neutralize 40.0 ml of 0.090M HCl? (Neutralization is defined as the point when the total amount of hydroxide ions and hydronium ions are equal, so that all can form water.) 2)What is the pH of a solution made by diluting 0.12 moles of acetic acid with water to make 1.0 liter of solution? 3)How many milliliters of 0.20M NaOH do you need to neutralize 40.0 ml of 0.12M acetic acid?
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