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Suppose that 1.252 g of impure barium hydroxide is dissolved in enough water to pro- duce 213.4 mL of solution and that 64.3 mL of this solution is titrated to the stoichiometric point with 29.5 mL of 0.0318 M HCl(aq). What is the percentage purity of the original sample?
The temperature of water at thermal equilibrium is 45*C. What was the initial temperature of the aluminum? The specific heat of water is 4.184 J/g *C & specific heat of aluminum is 0.0902 J/g*C
Determine the limiting reactant in each of the following reactions. Circle (Just label) the formula for the limiting reactant in each problem.
You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400 counts. has diminished to 100. counts after 35.2 minutes , what is the half-life of this substance
A 25.0 g sample of pure iron at 91°C is dropped into 57 g of water at 15°C. What is the final temperature of the water-iron mixture?
You are studying an enzyme that has a catalytic efficiency of 7x10^7M-1s-1. Knowing that the Km=2.50µM and how much enzyme did you use to obtain a maximum velocity of 2520 µM/min
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent
Name the alkene(s) with the molecular formula C6H12 that have two methyl branches on different carbons.
Calcium fluoride has a Ksp of 3.9 x 10^-11 at 25 C. What is the fluoride ion concentration at equilibrium
Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide according to the chemical equation shown below. When 0.030 mol of Na is added to 100.00 g of water, the temperature of the resulting solution rises from 25.00°C to 37.90°C
calculate the work done in joules when 50.4 g tin is dissolved in excess acid at 1.04 atm and 20 degrees celsius.
How many milliliters of a 533 mL solution of 1.3 M K3PO4 must be used to make 316 mL of a solution that has 0.79 moles of K+?
calculations of the sulfuric acid molarity if your average result from the titration of three 0.350 g samples is 15.72 mL. Please explain your answer in detail (words and calculations).
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