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Ammonium cyanate (NH4CNO) in water solution gradually isomerizes intourea (H2NCONH2), according to the reaction NH4CNO (aq) à H2NCONH2 (aq). Thisreaction obeys a second order rate law, with a rate constant k = 7.0 x 10-2 L/(mol min). If a 0.50 M solution of ammonium cyanate is prepared at some initial time, t=0, what concentration of ammonium cyanate is left after 100 minutes?
A solution of 0.0041 M of an unknown acid has a pH of 3.195. Calculate the Ka value for the unknown acid, HA.
How much will the pH change? The pKa of acetic acid is 4.760.
The blade of an ice skate is ground to a knife edge on each side of the skate. If the width of the knife edge is 0.001in., and the length of the skate in contact with the ice is 3 in., calculate the pressure exerted on the ice by a 150lb man.
the most common source of copper rm cu is the mineral chalcopyrite rm cufes2. how many kilograms of chalcopyrite must
When an interfering substance M is present, a fluoride ion selective electrode obeys the following modified response equation
What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound
calculate the composition in weight percent of an alloy that contains 90 kg of fe 20 kg of cr and 15 kg of ni. what is
Tf will be negative and so you must use negative Kf values. Either way, the freezing point of the solution should be lower than that of the pure solvent. Assuming 100% dissociation, Find the freezing and boiling points of 1.85 m Na2SO4(aq).
When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
Problem- Consider an electrochemical cell consisting of two vessels connected by a porous separator. One vessel contains 0.750 M HCl solution and an Ag wire electrode coated with AgCl solid. The other vessel contains 2.10 M MgCl2 solution and a Mg..
Calculating Kc, Given the amount of reactant in grams in a container at a temperature and amount produced in moles, calculate Kc:
Calculate the concentration of an oxalic acid (H2C2O4) solution when 48.1 mL of water is added to 18.2 mL of a 1.78 M oxalic acid solution
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