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Calculate the % ionization of nitrous acid (HNO2) in a solution that is 0.222M in nitrous acid and 0.278M in potassium nitrite (KNO2). Ka for nitrous acid= 4.50 times 10^-4
a 35.00 ml sample of naoh solution is titrated to an endpoint of 14.76 ml 0.4122 m hbr solution. what is the molarity
a mixture of 70 mole propane and 30 mole hydrogen is burned with 30 excess air. fractional conversions of 90 of the
the rate constant of some reaction double with 10 degree rise in temperature. assume that a reaction takes place at 295
How many mL of 0.25 N of NaOH will be used to titrate 0.348g of primary standard KHP, C6H4COOK . COOH?
solution is needed to just neutralize excess acid after 20 mL of 0.500 M HCL was added to 1.00 g of the antacid, how many moles of acid can the antacid counteract per gram?
C=3R/2 Express your answer to three significant figures and include the appropriate units. part c Calculate delta U for this process, assuming that . c=3R/2 Express your answer to three significant figures and include the appropriate units part d ..
If a mixture containing 27.76 g each of NH4Cl and Ca(OH)2 is heated, how many grams of NH3 will be produced. Which reactant remains in excess, and in what mass
calculate gibbs free energy and determine the type of thermodynamic reaction.n2gnbsp 3h2gnbsplarrrarr 2nh3gnbsp
In preparing solutions of the unknown acids, a much smaller mass of acid is used than in preparing an equal volume of KHP solution to achieve about the same concentration. Why is this
A Researcher reads directions that call for addition of 25.0 mL of anhydrous ethanol (ethyl alcohol). From among the bottles in the lab, which one should she select
Calculate how many gallons of the strong vinegar would need to be added to the 10,000 gallons of the weak vinegar to obtain a solution that is the appropriate 5.10% acetic acid by mass.
Pure water containing no arsenic was spiked with .40micrograms arsenate/L. Seven replicate determination gave .39 ,.40, .39, .41, .36, .35,.and .39 microgram/L. Find the mean percent recovery of the spike and the concentration detection limit
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