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You want to clean a 500-ml flask that has been used to store a 0.9M solution. Each time the flask is emptied, 1.00 ml of solution adheres to the walls, and thus remains in the flask. For each rinse cycle, you pour 9.00 ml of solvent into the flask (to make 10.00 ml total), swirl to mix uniformly, and then empty it. What is the minimum number of such rinses necessary to reduce the residual concentration to 0.0001 M or below?
The combustion of SO2(g) has Keq=5.60x10^4 at 350 degrees Celcius. If 0.350bar of SO2(g) and 0.762bar of O2(g) are mixed initially, what are the partial pressures of each of the three gases when the mixture reaches equilibrium? Reaction: SO2(g) + ..
Hydrogen has two naturally occurring isotopes 1H (mass= 100783), and 2H (mass= 2.0140). If the atomic weight of hydrogen is given as 1.0079, which one is the more abundant isotope
If one gallon of paint can cover a square room as well as ceiling with walls that are 9.74 feet high and 9.74 long, Explain what is the thickness of the paint (in micrometers)
Calculate the equilibrium constant for the chemical system described by the following chemical equation: 4 Al (s) + 6 Ni2+ (aq) 4 Al3+(aq) + 6 Ni(s) The 2+ and 3+ indicate charge. How do you calculate the Keq
For the reaction 2HCl+Na2CO3 →2NaCl+H2O+CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP?
What will the pH of the equivalence point be when 10.00 mL of .0200M Carbonic acid is fully titrated to the 2nd end point using .05 M NaOH?
Is the dissociation of NaCl reversible. When you dissolve it in water does it dissociate and associate back together
If a solution is made by mixing 20.0mL .4M NaCH3COO with 30mL .4 CH3COOH, calculate the pH for acetic acid, Ka = 1.76x10^-5.
What is the cell potential for the reaction Mg(s)+Fe2+(aq) -> Mg2+(aq)+Fe(s) at 63 degrees celsius when [Fe2+] = 3.50M and [Mg2+] = 0.310M. Express your answer to three significant figures and include the appropriate units.
Distinguish between total energy and mechanical energy. In the context of the conservation of energy, what is a system? When is total energy conserved? When is mechanical energy conserved?
Draw one energy diagram showing both reaction pathways & label all transition states, intermediates and products as well as activation energies. you may assume that the overall reactions are both exergonic while the first step in each reaction is ..
a family heats their house with propane gas. the gas company reports that for an average home it takes 26.970 kj of
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