Find identity and the atomic mass of the other isotope
Gallium has an average atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exists as Ga-69 (68.9257 amu). What is the identity and the atomic mass of the other isotope?
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Provide an explanation for the trend observed by comparing the basicity of the oxyanion bases. Include any additional structures necessary in your explanation! B ase % 1-Butene in Total Butenes Potassium p-nitrobenzoate 5.8 Potassium benzoate 7.2
Calculate the value of the solubility product constant for PbSO4 from the half-cell potentials. PbSO4(s) + 2e- ? Pb(s) + SO42-(aq) Eº = (-0.383) V Pb2+ + 2e- ? Pb(s) Eº = (-0.127) V These half-cell potentials are not accurate.
Calculate the pH of the solution after 52.00 mL of HNO3 is added. What is the: 1) moles of KOH: 2) moles of HNO3: 3) [H3O]+: 4) pH of the solution
How many total isomers are possible for the compound [Co(C2O4)2(NH3)Cl]2-? Make sketches of these isomers. Indicate optical isomers and draw them as mirror images.
A solution is prepared by dissolving 2.86 grams of sodium chloride, 3.9 grams of ammonium sulfate, and 0.896 grams of potassium iodide in 246 grams of water. Calculate the total mass of the solution
36 grams of an impure zinc sample are reacted with excess hydrochloric acid and 10 L of hydrogen gas are collected at STP, what is the percentage of PURITY of zinc sample?
A bimolecular reaction is found to be 1st order with respect to both reactants. If the rate of reaction is 1.87 mol/L ·s at 25 oC, what is the reaction rate if both reactant concentrations are doubled? A) 7.48 mol/L ·s B) 46.8 mol/L
After completing the calculations below, sketch the pH curve for the titration of 25.0 mL of 0.150 M solution of a weak base, B (Kb = 6.8 x 10^-5), with 0.150 M HI. Indicate the pH
If a chemical reaction, A + B ---> C + D, is endothermic, what is the sign of ΔH for the reaction? Would the temperature recorded in the calorimeter well for such a reaction increase or decrease? Explain.
A salt dissolves in water to form a green solution. A precipitation is formed when the aqueous solution is treated with buffer NH4C/NH3 and thioacetamine.
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