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1) A 290 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution?
2) A 130 mL stock solution contains 1.5 M CuF2. When 15 mL of the stock solution is diluted to 23 mL, what will the concentration of F- ions be?
3) A stock solution is prepared by adding 25 mL of 1.7 M Na2SO4 to enough water to make 40 mL. How many moles of Na+ are in 10 mL of the stock solution?
4) A stock solution is prepared by adding 25 mL of 1.4 M Pb(ClO3)2 to enough water to make 57 mL. How many moles of ClO3- are in 30 mL of the stock solution?
5) How many milliliters of a 95 mL solution of 1.5 M K2SO4 must be used to make 65 mL of a solution that has a concentration of .71 M K+?
6) A 13 mL sample of a solution of Pb(ClO3)2 was diluted with water to 21 mL. A 15 mL sample of the dilute solution was found to contain 0.025 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
7) What is being calculated when the molarity of the solute in a solution is divided into the moles of a solute in the solution?
0.75g of hydrogen chloride is dissolved in water to make 2.5L of solution. What is the pH of the resulting hydrochloric acid solution.
Calculate the molarity of a solution of glycerol made by dissolving 59.000 mL glycerol at 15 degrees celcius in enough water to make 380.00 mL of solution
The crystalline form of silver (Ag) is composed of face-centered cubic unit cells. If the density of silver is 10.48 g/cm3 at room temperature
Determine whether each of these species follows the octet rule, is octet deficient (central atom works with less than eight electrons in its valence shell), or has an expanded octet (central atom works with more than eight electrons in its valence..
Estimate the ratios of the basic and acidic forms of the histidine side chain
Calculate the pH of a buffer solution obtained by mixing 400.0 mL of 0.200 M acetic acid solution and 100.0 mL of a 0.300 M sodium hydroxide solution.(The pKa of Acitic Acid, CH3OOH is 4.74)
which of the following exhibits dipole-dipole intermolecular forces: HBr, NBr3, SBr2, CBr4?
If 1 gallon of paint can cover a square room and ceiling with walls that are 9.36 feet high and 9.36 long, what is the thickness of the paint (in micrometers)?
Determination of the composition of a mixture You will be given a multi-component mixture and will be required to determine (and confirm) the %composition of the mixture, obtain a sample of each component and to verify its purity and identity.
If 2.55 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 -→ CO2 + H2O , how much oxygen is required? Answer in units of mol.
Calculate the Pickering series wavelength associated with the excited state ni = 9.What region of the electromagnetic spectrum does this transition fall in?
If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture?
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