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A water sample contains 118mg/L of bicarbonate ion, 19mg/L of carbonate ion, and has a pH of 9.5. What is the alkalinity of this water expressed as mg/L of CaCO3?
Consider a titration of 24.2 mL of 0.0878M solution of aqueous ammonia [Kb(NH3) = 1.8e-5] with a 0.115M of hydrochloric acid.
Calculate the fraction of space that is occupied by packing spheres in the (a) simple cubic, (b) body-centered cubic, (c) face-centered cubic (close packed) structures
One of the emission spectral lines for Be3+ has a wavelength of 253.4 nm for an electronic transmission that begins in the state with n = 5.
What volume of this solution is required to make 1.50 L of 2.75 mol/L NH3(aq)? Give your answer in millilitres, accurate to three significant figures.
A sample consisting of a 2.5 mol of a perfect gas at 220 K and 202.6 kPa is compressed reversibly and adiabatically unitil the temperature reaches 225 K.
Citric acid is a triprotic acid with pKa1=3.15; pKa2=4.77; pKa3=5.19. Calculate the concentrations of all species in solution.
Consider a lithium nucleus, of charge +3q Calculate the first three electron energies for an electron in Li++ ion
The high resolution mass of a compound was measured to be 187.0878, Determine a likely molecular formula for this compound and explain how you arrived
5.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture
Calculate the pH of a solution prepared by mixing 20mL of .20M NH3 with 40mL of .10M HNO3 (Kb for NH3= 1.8 x 10^-5)
Write the cell reaction and electrode half-reactions, and calculate the standard potential for each of the following cells: a) Pt|Fe3+(aq),Fe2+(aq)||Sn4+(aq),Sn2+(aq)|Pt
Solubility of Terpin Hydrate for Chemistry Students, what is the structure of terpin hydrate and is it more soluble or less than starting material?
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