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An unknown polyprotic carboxylic acid possesses a molecular weight of 493.65g/mol. The carboxylic acid can be titrated according to the following equation: HxCyOz + NaOH --> xH2O + NaxCyOz If 27.33ml of 0.0973M NaOH were used to titrate 0.328g of pure unknown carboxylic acid, determine the number of reactive H in a single molecule of the carboxylic acid.
The most two most abundant elements in the crust are oxygen (4.55 X 10^5 g/t, where t stands for metric ton; 1 t=1000kg) and silicon (2.72 X 10^5 g/t), and the two rarest non radioactive elements are ruthenium and rhodium, each with an abundance o..
element is the central atom of sodium chloride, megnesium sulfate, calcium carbonate, ammonia, and hydrogen cyanide?
A 5.00 L flask at 279 K contains a mixture of He and O2 with a total pressure of 1.00 atm. If the mole fraction of O2 is 0.40, what is the mass fraction of O2?
the major differences in the dehydration of an alcohol by an E1 and E2 reaction mechanism.
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium acetate will produce the most effective buffer
What is the heat of neutralization per mole of HCl? Assume that the original solutions made independent contributions to the total heat capacity of the system following their mixing. ( in kJ/mol)
An aqueous solution contains 3.00% phenylalanine (C9H11NO2) by mass. Assume the phenylalanine is non-ionic and nonvolatile. Find the following
the mass loss of the iron nail was 1.511. How many moles of iron were converted to Fe3+?
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?
A student dissolves 0.2975 g of the unknown weak acid to give 100. mL solution. S/he obtains the following titration curve for his/her best titration. At the equivalence point, 19.0 mL of 0.1000 M NaOH was added.
What mass of lead sulfate is formed in a lead-acid storage battery when 1.41g of Pb undergoes oxidation
calculate the molarity of of the following solutions 6.57g of methanol ( CH3 OH) in 1.50 x 10^2 mL solution
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