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If I calculate avogadro's number using the mass gain of copper at the cathode rather than by using the mass loss at the anode, what sort of differences can I expect if any
if the open-tube manometer in the figure below contains a nonvolatile silicone oil density 1.30 gcm3 instead of
A buffer was formed by mixing 50.0 mL of 0.206M NH4Cl(aq) with 45.0 mL of 0.222M NH3(aq) {Kb (NH3) = 1.8 x10-5 } . What is the pH of this buffer solution?
Explain the hybridization of carbon in C2H2 using electron configuration diagrams of the original atoms, excited staes
Calculate the expectation value for the potential energy of the H atom with the electron in the 1s orbital. Compare your result with the total energy
The overall formation constant for Cu(NH3)42+ is 1.1x1013 at 25oC. What is [Cu2+], in moles per litre, at equilibrium when 8.3 g Cu(NO3)2 is dissolved in 0.500 L of 1.00 mol/L NH3(aq)? Assume that there is no volume change when the Cu(NO3)2 is add..
Calculate the concentration of an oxalic acid (H2C2O4) solution when 48.1 mL of water is added to 18.2 mL of a 1.78 M oxalic acid solution
The equivalence point of the titration occurs at 23.74mL . Determine the molar mass of the unknown acid.
What is the vapor pressure of a solution prepared by dissolving 51.0 g of C6H12O6 (a nonvolatile solute) in 120 g of water? (Assume the solution is ideal.)
If Hg and 1.50g O2 are obtained from heating 56.0g HgO, what is the masspercent yield of O2 ? Hint work out the stoichiometry of the reaction first.
A student is required to generate 90.0 mL of carbon dioxide at 750 mm Hg and 21C using potassium hydrogen carbonate and HCl. What is the mass of the potassium hydrogen carbonate needed?
Calculate the distances NH3 gas and HCL gas would travel in this experiment if a 100.00-cm tube were used, based on the accepted molar masses of the two gases.
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward
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