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If you presume that the NaOH which you will prepare for standardization is approximately 0.15 M, compute the number of moles and the number of grams of H2C2O4 * 2H2O required to neutralize 25mL of this NaOH solution
a metal has a threshold frequency of 7.5x1014 hz. determine the wavelength m of the electron emitted from the metal
How many moles of chloride ions are there?
Calculate the freezing point and the boiling point of each of the following aqueous solutions. (Assume complete dissociation.) (a) 0.032 m MgCl2
I understand the rules for significant figures with multiplication/division, and adding/subtracting. But I am unsure of what to do when there is both multiplication and/or division, and adding and/or subtracting in the same question?
What volume of hydrochloric acid solution of 0.25 M must be diluted to prepare 1.00 L of 0.040 M HCl and calculate Keq at this temperature for the given reaction 2 NOCl (g) W 2 NO (g) + Cl 2 (g) ( reaction is at equilibrium):
What is the difference between an amino acid and a protein? How does this difference in structure affect biological function?
The pH of a 0.02M solution of a weak acid was measured to be 4.6. What is the [H+] in the solution? Calculate the Ka and pKa for this acid.
Calculate the molar solubility of Mg(OII)_2 in a solution with a pH of 12.8 (K_op of Mg(OH)^2 is 1.2 * 10^-11
Define the reaction is second order in C4H6. Suppose the rate constant is 4.0 x 10^-2 M^-1s^-1, and the initial concentration of C4H6 is 0.080 M, Define how long will it take the concentration of C4H6 to reach 0.400M. Also how long are the 1st and..
Identity the species with the larger radius in each of the following pairs. Use the concept of effective nuclear charge to explain the difference in radius for each pair. a) Cl or S b) Cl- or S2- c) Na or Mg d) Mg2+ or Al3+
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295k and volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1 mL atm K^-1 mol..
Calculate the total heat capacity in J/degreeC for a bomb calorimeter that contains 2069g of water(Sp.Ht=4.18 J/g degreeC) 588g steel bomb (Sp.Ht.=0.88 J/g degreeC) 12g thermometer (Sp.Ht.=0.79 J/g degreeC)
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