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How whould you prepare a liter of carbonate buffer at a PH of 10.10, you are provided with carbonic acid, sodium hydrogen carbonate and sodium carbonate?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 69.8 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Erythromycin is a weak base that has a pkb of 5.20. Twenty-five ml of 0.30 M solution of erythromycin is titrated with 0.35 M nitirc acid . Calculate the pH in each of the following additions of acid.
What are the sources of error that could happen in the experiment of ''dumas method for determining the molecular weight of volatile liquids''
Consider a galvanic cell consisting of a magnesium electrode in contact with 1.0 M Mg(NO3)2 and a cadmium electrode in contact with 1.0 M Cd(NO3)2. Calculate Eo for the cell and draw a diagram showing the cathode, anode
what is the molecular formula of a compound that contains 28.2% of potassium ,25.6% of chlorine and 46.2% of oxygen ? the molar mass is 138.5u.
HSO4^-(aq) + H2O(l) H3O^+ (aq) + SO4^2- (aq) Ka for aqueous dissociation of HSO4- is 1.2*10^-2 What is the pH of a sol containing equal concentrations of SO4^2- and HSO4^-
Which of the following combinations of reactants would lead to the occurrence of an oxidation-reduction reaction. (a) Ag (s) + HCl (aq) (b) Zn (s) + NiCl2 (aq) (c) Ca(NO3)2 (aq) + ZnCl2 (aq) (d) Ag (s) + Au (s) (e) Cu (s) + ZnCl2 (aq)
Indicate which of the following are reasons for performing a simple distillation in this procedure (more than one answer may be correct): a. To obtain pure diethyl ether
how many radial nodes are present in the radial eigenfunction associated with the 3p atomic orbital associated with the 3p atomic orbital for hydrogen like atom?
How many liters of liquid nitrogen are produced when 982.0 L of nitrogen gas is liquefied at 77.36K?
Which one of the following does not react with aqueous sodium hydroxide?
If 2.44 moles of Helium gas has a pressure of 2.4 atm at 343 K, what volume must the gas occupy.
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