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How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.4 L of 0.13 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.76?
determine the equilibrium ph of aqueous solutions of the following strong acids or bases: a)15mg/l of hso4- b)10 mM NaOH c)2500 mg/l of HNO3.
having a block of wood is either pine or oak with dry weight 19.8 lbs and can displace a volume of 2.7 gallons of
based on their activation energies and energy changes and assuming that all collision factors are the same which of
If a space probe weights 39,200 N on the surface of earth, what will be the mass of the probe on the surface of mars.
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. What mass of dinitrogen monoxide is present after 15.0 g calcium nitrate and 17.50 g ammonium fluoride react completely
Describe the transition using term symbols. Compute the wavelength, frequency and wavenumber of the transition. by how much does the mean radius of the electron change due to the transition.
Aluminum reacts with oxygen to yield aluminum oxide. If 5.0g of AL reacts with 4.45g of oxygen what is the empirical formula of aluminum oxide
A piece of metal of mass 27 g at 105?C is placed in a calorimeter containing 49.2 g of water at 19?C. The ?nal temperature of the mixture is 30?C. What is the speci?c heat capacity of the metal.
what is the mole fraction of magnesium chloride in a solution prepared by adding 15 grams of magnesium chloride
What was the concentration (mol/L) of the permanganate solution. Submit answers correct to two decimal places.
In each case indicate whether the addition of an electron to the ion would increase or decrease the bond order of the species. Li2+, Ne2+2, N2+, and B2+
Suppose that the silver-silver chloride electrode in the figure is replaced by a saturated calomel electrode. Calculate the cell voltage if [Fe2+]/[Fe3+] = 5.0 10-3. V
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