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What volume of {rm{O}}_2 gas (in {rm L}), measured at 795 {rm mmHg} and 33^circ {rm C}, is required to completely react with 54.0 {rm g} of {rm Al}?
N2 is .070 moles, O2 is 0.35 moles and CO2 is 0.20 moles, the total is pressure 1.55 atm what is the pressure of N2?
Sulfuric acid is a diprotic acid with the formula H2SO4. Phosphoric acid is a triprotic acid with the formula H3PO4. Which will have a lower pH as aqueous solutions? A 1 M solution of H2SO4 or a 1M
Calculate the apparent degree of dissociation of the NH4Cl if the freezing point of this solution is -15.3OC?(Molal freezing point constant =1.86OC)
What is the pH at the equivalence point in the titration of 10.0 mL of 0.51 M HZ with 0.200 M NaOH? Ka = 5.1 × 10-6 for HZ
A 35.00 mL sample of NaOH solution is titrated to an endpoint of 14.76 mL 0.4122 M HBr solution. What is the molarity pf the NaOH solution?
A 25.00 mL sample of 0.100 M CH3CO2H is titrated with 0.100 M NaOH. What is the pH of the solution at the points where 24.0 and 24.5 mL of NaOH have been added. (Ka = 1.8 x 10-5).
What is the similarity between metal olefin and metal hydrogen bonds?
Al3+ is reduced to Al(s) at an electrode. If a current of 2.00 ampere is passed for 48 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency.
An aqueous antifreeze solution is 48.5% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.062 g/cm3. Calculate the molality, molarity and mole fraction of ethylene glycol
What is the percent by mass of a solution in which 60. g of NaOH are dissolved in sufficient water to make 100 g of solution?
A 200 mL stock solution contains 0.9 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
A sample of ethanol (C2H5OH) has a mass of 43.8 g.
A 14 mL solution of succinic acid has a concentration of 10 mM. This solution is titrated with 8 mM lithium hydroxide. Determine the pH of the solution at each of the titration volumes listed below:
1) what is the molarity of a kf(aq) solution containing 116g of KF in 1.00 L of solution? 2) What is the molarity of an H2SO4 solution if .25L os the solution contains .75 mol of H2S04?
Calculate the concentration of nitrate ions in the resulting solution (don't forget about the stoichiometry), and determine the uncertainty in that value. What is the primary contribution to the unc
Which of the following is a typical property of an ionic compound?
To obtain Ksp for PbI2, we must calculate [Pb2+] in each equilibrium system. This is most easily done by constructing an equilibrium table.
Calculate the molar concentration of OH - ions in an 1.37 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
A 3.50 g sample of solid Mg(OH)2 was treated with 50.0 mL of 0.500 M H2SO4(aq). After the reaction was over, some of the Mg(OH)2 remained undissolved. Calculate how many g of solid Mg(OH)2 remained.
Please comment on The mineralogy, chemistry and origin of alkaline igneous rocks with illustrated examples.(Unlimited words)
How many moles of dinitrogen tichloride correspond to 645 mg of dinitrogen trichloride? How many nitrogen atoms would be required to produce that amount of dinitrigen trichloride.
How many mL of water at 23degrees celsius with a density of 1.00g/mL must be mixed with 180mL(about 6oz) of coffee at 95 degrees so that the resulting combination will have a temperature of 60degree
Use average bond energies to estimate the energy change (in kJ/mol) for the reaction (all bonds are single bonds except as noted):
A system at equilibrium or striving to reach equilibrium responds in a way that best ac- commodates or reduces any stress placed upon it. What is this known as in chemistry?