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A solution was prepared by dissolving 1 g of NaHCO3 in 100mL of water. Explain how much anhydrous sodium carbonate, NaCO3 must be added to this solution thus that the pH of the resultant mixture is 10.33?
there are two natuarlly occuring isotopes of rubidum. (85)Rb has a mass of84.9118 amu. (87)Rb has a mass of 86.9092 amu. Determine the abundance of each isotpe.
To melt an ionic solid, energy must be supplied to disrupt the forces between ions so the regular array of ions collapses. If the distance between the anion and cation in a crystalline solid decreases
It took 3.66 min with a current of 2.28 A to plate out all the silver from 0.210 L of a solution containing Ag+. What was the original concentration of Ag+ in the solution
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
Consider the titration of 25.0 mL of a 0.723 M HCl solution with a 0.273 M KOH solution. Calculate the hydrogen ion concentration before any titrant, KOH solution, is added.
Show the bond angles which are at least slightly different that are shown by the H2CCBr2 molecule.
how many grams of ammonium sulfate can be produced in 30 mol of h2so4 react with excess nh3 according to the equation
a sample of methane gas ch4 at 12.8 oc is heated. the pressure increases from 1.10 atm to 3.06 atm and the volume of
The solution was then placed in the spectrophotometer as well as an absorbance was obtained and after a few calculations the molar concentration was computed to be 3.5 × 10-6 M. Explain what was the concentration of the original solution
Given the following thermodynamic data, calculate the lattice energy of CaBr2 (s). Term & Value Delta Hf[Ca(g)] 179; delta Hf[Ba(g)] 112; I1(Ca) 590; I2(Ca) 1145; E(Br) -325.
determine the kinetic energy of the emitted electrons when cesium is exposed to uv rays of frequency 1.3 x 1015 hz?
MgNH4PO4 x 6H2O has a solubility of 0.023g/100 mL in water. Presume a 5.02g sample was washed with 20mL of water. Explain what fraction of the product would be lost
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