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If the rate of disappearance of N2O5 is equal to 1.80 mol/min at a particular moment, what is the rate of appearance of NO2 at that moment?
What is the of a buffer system that contains 0.210 hydrocyanic acid and 0.240 sodium cyanide ? The of hydrocyanic acid is 9.31.
What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0kg calcium phosphate with 1.0kg concentrated sulfuric acid (98% H2SO4 by mass)?
Acetylene gas (C2H2) used in welding, produces an extremely hot ?ame when it burns in pure oxygen according to the reaction 2 C2H2(g)+5 O2(g) -→ 4 CO2(g)+2 H2O(g)
A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?
Determine the acid dissociation constant for a 0.10M acetic acid solution that has a ph of 2.87. Acetic acid is a weak monoprotic acid and the equilibrium equation of interest.
Potassium hydrohen phthalate, KHC8H4O4, functions as monoprotic acid. If a 1.46 g sample of impure KHC8H4O4 requires 34.3 ml of 0.145 M NaOH, what percentage of KHC8H4O4 is in the material?
Determine the number of moles of barium chlorate that can be prepared from 1.73 mol of chloric acid (HClO3) and sufficient barium hydroxide [Ba(OH)2]
What volume of oxygen gas, measured at 23 C and 0.980 atm is needed to react with 2.50g of C5H12? What volume of each product is produced under the same conditions?
how to find the maximum percentage yield of the ketene when the phase-gas decomposition of acetic acid at 1189K proceeds by way of two parallel reactions.
Consider the same dilution above for an SN1 reaction. Would the time required for 95% for the starting material to react change as a result of this dilution?
How many grams of oxygen gas are required to produce 7.68 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water?
An industrial chemist puts 1.45 mol each of H2(g) and CO2(g) in a 1.00-L container at a certain temperature. When equilibrium is reached, 0.60 mol of CO(g) is in the container. Find Keq at this temp
Given that the ph for acetic acid is 2.41, the ka=1.8X10-5 and assuming the density of vinegar to be 1.00g/cm3, what is the percent dissociation for acetic acid in vinegar?
Suppose that a sample of pure water is saturated with gaseious CO2 to form a solution of carbonic acid. which response has the following species arranged in the order of decreasing concentrations at
The vapour pressure of water at that temperature is 27.1 mm Hg. Assume that all of the KClO3(s) decomposed. What was the %w/w of KClO3(s) in the original mixture?
iron has a density of 7.87 g/cm. What mass of iron would be required to cover a football playing surface of 120 yards x 60 yards to a depth of 1.0mm?
Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of N2O(g) is ______kJ/mol
what is the pH of a 0.100M solution of benzoic acid if ka=6.5x10-5 and the equilibrium equation of interest is : HBz(aq)+h20(l)<--->h3O+(aq)+Bz-(aq).
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2. What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid
A gas mixture is made by combining 7.9g each of Ar and Ne and an unknown diatomic gas. At STP the mixture occupies a volume of 18.73L. What is the molar mass of the unknow gas?
If 156 mL of wet H2 is collected over water at 24 degrees celcius and a barometric pressure of 737 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.3 torr.)
If 28.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
Discuss two ways that ammonium compounds decompose when they are heated. What chemical reaction is involved in the thermal decomposition of ammonium persulfate?