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You prepare a buffer solution by dissolving 1.77 g each of benzoic acid, HC7H5O2, and sodium benzoate, NaC7H5O2, in 900.0 mL of water.The pH of the buffer is 4.19. How much (in grams) of the buffer (benzoic acid), would you add to the 900.0 mL of buffer to change its pH to 3.83?
From the time the mass of the flask is first measured until the time it is finally measured, it is handled a number of times with oily fingers. Does this lack of proper technique result in the molar mass of the vapor in the flask being reported as..
Calculate the percentage of chlorine in a sodium hypochlorite powder (disinfectant for pools) if 5.0 kg of powder gives off 2.3 kg of chlorine.
Provide a Diagram of a lab setup that can be used to separate a mixture of ethyl acetate and aspirin (a solid organic compound).
Suppose you have a mixture of 2 substances. You know one of the substances is either 2-chlorobenzoic acid or diphenyl acetic acid. The second substance is either p-dibromobenzene or acenaphthylene.
A sample of neon effuses from a container in 79 seconds. The same amount of an unknown noble gas requires 161 seconds.
Calcium Oxide reacts with water in a combustion reaction to producee calcium hydroxide: CaO(s) + H2O(l)----> Ca(OH)2(s)
A solution contains .60 M NH4OH and 1.5 M NH4Cl. what is the maximum concentration of Mg2+ that can be present in such a solution without precipitating Mg(OH)2
The mass of a cube of iron is 338 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Considering given equation as P4(s) + 5 O2(g) P4O10(s) where ΔH = -3013 kJ/mol you just need to compute the heat evolved when 436 grams of white Phosphorous (P4)burns in air according to the given equation as above.
Although the actual process also requires water, a simplified equation for rusting (rust is shown as Fe2O3) is 4Fe(s) + 3O2(g) => 2Fe2O3(s) ?Hrxn = -1.65 x 103 kJ How much heat is evolved when 0.100 kg of iron rusts
Suppose that 24 of each of the following substances is initially at 29.0. What is the final temperature of gold upon absorbing 2.30 of heat?
suppose the experiment was done with 1.0m H3PO4 as the acid. What would be the stoichiometric ratio, mol H3PO4/mol NaOH at the intersection of ascending and descending portions of the graph?
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