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From equation E=kQ1Q2/d as well as the ionic radii given in the figure, compute the potential energy of the subsequent pairs of ions. Presume that the ions are separated by a distance equal to the sum of their ionic radii.
1) Na+, Br-
2) Rb+, Br-
3) Sr2+, S2-
Calculate the concentrations of all species in a 1.01 M Na2SO3 (sodium sulfite) solution
baking soda (NaHCO3) can be made in large quantities by the following reaction: NaCl + NH3 + CO2 + H2O ---> NaHCO3 + NH4Cl If 9.41g of NaCl reacts with excesses of the other reactants and 3.81g of NaHCO3 is isolated, what is the percent yield of t..
the geometric angle between the two bonds that connect an alpha-carbon to its nearest neighbors on the polypeptide
A gaseous mixture contains 0.30 mole of co(g), 0.10 mole of H2(g) AND an Unknown amount of CH4(g) in a litre flask. this mixture is in equilibrium at 1200 deg K acc to
The student titrated 25.0 mL of the buffer with 0.115 M NaOH. What is the concentration of the weak acid in the buffer? what is the buffer strength i.e, the total HA and A
A 100.0 mg sample of a common organic compound containing C, H and S was burned in oxygen, forming 283.5 mg of CO2 and 48.4 mg of H2O. What is the simplest (empirical) formula of this compound
In this experiment you are adding naphthalene to cyclohexane and using the freezing point depression to determine its molecular weight. What would happen to the measured freezing point depression if you add an equal mass of Acenaphthene
An ammonia/ammonium buffer solution contains 0.19M NH3 and 0.61M NH4+. The Kb value of ammonia is 1.8 x 10^-5 . Calculate the pH of this buffer.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Based on understanding of enthalpy, what is the sign of dH for the binding of Cu2+ to soil. Explain.
Complete and Balance including physical states and solubility rules. MgCL2 (aq) + K3PO4 (aq)
what is the density of 53.4 wt% aqueous NaOH if 16.7 mL of the solution diluted to 2.00L gives 0.169M NaOH
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