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A 0.5000-g sample of impure Ca(OH)2 is dissolved in enough water to make 73.30 mL of solution. 20.00 mL of the resulting solution is then titrated with 0.1341-M HCl. What is the percent purity of the calcium hydroxide if the titration requires 21.42 mL of the acid to reach the endpoint?
A 75.0-L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank?
what is the concentration of ammonia in a solution if 20.75ml of a .1130M solution of HCl are needed to titrate 100.0mL of that solution
Assume the temperature of the mixture is chosen so that Kp=0.12. Predict the effect on the partial pressure of SO3 as equilibrium is achieved by using Q, the reaction quotient.
How much heat is required to vaporize 25.5 g of water at 100 C? The heat of vaporization of water at 100 C is 40.7 rm kJ/mole.
a solution is prepared by adding enough water to 387 g of CsCl to form 1 liter of solution. What is the mass of the solution? the density of the solution is 1.384 g/mL.
Answer the following questions: a) can Al3+(aq) oxidize tin (Sn) under standard-state conditions?; b) would it be OK to store an aqueous AlCl3 solution in a tin container?; c) can Sn2+(aq) oxidize aluminum (Al) under standard state conditions?; d)..
An unknown metal m reacts with sulfur to form a compound with the formula M2S3. If 3.12g of m reacts with 2.88g of S, what are the names of M AND M2S3
Use the valence bond thoery to determine whether the complex ion CoCl4^2- is a square planar or tetrahedral. measurements of its paramagnetism show that it has three unpaired electrons
What is the area of the circuit element in cm^2? Write your answer in scientific notation. Round your answer to 3significant digits.
what is the flow rate of the gas stream leaving the condenser in mole/ min. hint first calculate the molar flow rate of the conensate and note that rate at which C6H14 an N2 enter the unit must equal to the total rates at which they leave in the t..
The boiling point of methanol (CH 3 OH) is 64.7 o C and delta H vap = 71.8 kJ/mol. What is delta S for the vaporization of 2.15 mol of CH 3 OH at 64.7 o C?
When are covalent bonds most likely to form? a. between 2 atoms with a high ionization energy b. between 2 with a low ionization energy. c when one atom high and other low d. no correct choice. (I'm leaning towards a.)
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