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How would you prepare 2.0 Liters of 0.20 M NaOH solution from50% (w/w) NaOH solution that has a density of 1.53 g/mL? All measurements must be by volume and not mass.
At the unspecified temperature dinitrogentetraoxide partially decomposes according to the following equilibrium
What is the pH of the resulting hydrochloric acid solution and 0.40 g of hydrogen chloride (HCl)is dissolved in water to make 6.0L of solution
When potassium carbonate is added to the remaining solution, a precipitate occurs. Which ions were present in the original solution? Write net ionic equations for the formation of each of the precipitates observed.
A 5 kg aluminum block sits in your lab, which is at 21 C. You wish to increase the temperature of the block to 50 C. How much heat in [J] must be supplied
A solution that is made by combining 125mL of 0.050 M hydrofluoric acid with 50.0mL of 0.10 M sodium fluoride.
A tank is first evacuated, and then connected to a 75.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 15.8 atm, falls to 1.05 atm without a change in temperature. What is the volume of the tank?
Predict what will happen when the following pairs of solutions are mixed. Write the molecular, complete ionic, and net ionic equations. Give the spectator ions.
The specific heat of Al and water are 0.90 J/(goC) and 4.184 J/(goC), respectively. Calculate the equilibrium temperature.
What volume will 5.6 moles of Sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128 deg C, and 9.4 atm
For a particle in a box system, by what factor do you need to change the box length to decrease the transition energy by a factor 5 for a fixed value of mass
How many grams of Na2CO3 are present in 29.7 mL of a 31.0% Na2CO3 solution. The density of the solution is 1.09 g/mL.
The activation energy for the diffusion of car- bon in chromium is 111,000 J/mol. Calculate the diffusion coefficient at 1100 K (827??C), given that D at 1400 K (1127??C) is 6.25 ?? 10??11 m2/s.
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