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A mixture is prepared by mixing a 0.10 L solution of 0.12 M NaCl with a 0.23 solution of 0.18 M MgCl2. What volume of a 0.20 M silver nitrate solution is required to precipitate all the Cl ions in
How many moles of sodium hypobromite, NaBrO, should be added to 1.00L of 0.050M hypobromous acid, HBrO, to form a buffer solution of pH 8.80?
The original conditions on a container filled with gas at a constant temperature are 180 cc and 300 mm Hg. The desired new volume is 90 cc.
According to the following reaction, how many moles of nitrogen gas will be formed upon the complete reaction of 0.646 moles nitrogen monoxide with excess hydrogen gas?
An unknown sample of N2+ gave a current of 2.36µA in an electrochemical analysis. When 0.500 mL of solution containing 0.0287M N2+ was added to 25.0 mL of unknown, the current increased to 3.7
A graduated cylinder contains 138 of water. A 12.0 piece of iron (density = 7.86 ) and a 22.0 piece of lead are added. What is the new water level in the cylinder?
A metal container holding xenon gas (Xe) has a pressure of 458 torr at 20 degrees celcius. At what temperature will the pressure be 1.00atm?
determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6.
A solution is made by dissolving 26.42g of (NH4)2SO4 in enough H2O to make 50.00mL of solution. What is the molar mass of (NH4)2SO4?
A compound is 40.0% C, 6.70% H, and 53.3% O by mass. Assume that we have a 100.- g sample of this compound. What are the subscripts in the empirical formula of this compound?
Calculate the expected pH of a 25.0 ml solution of 0.200 M acetic acid that is being titrated with a 0.100 M solution of NaOH at any point in the region II of the titration. (Ka of CH3COOH =
The mass of a cube of iron is 324 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
The half life of a second order reaction in reactant A with an initial concentration equal to 0.200 M is 45.6 sec. What is the second order rate constant (M-1s-1)?
The mass of a cube of iron is 434 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Calculate the work done in joules when 50.4 g tin is dissolved in excess acid at 1.04 atm and 20 degrees celsius. assume ideal gas behavior.
How many atoms is 3.87 moles of lithium? how many molecules is 0.342 moles of phosphorus pentachloride? How many moles of oxygen atoms are in 0.634 moles of nitrogen dioxide?
A bottle containing 315 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
If we add CO2 to increase its concentration to 0.25 mol/L, what will the concentrations of all the gases be when equilibrium is reestablished?
Water, 1-butanol, and catalytic sulfuric acid, a simple distillation is required. what impurities are removed by this distillation?
A 45- piece of ice at 0 is added to a sample of water at 20. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?
Write separate oxidation and reduction half reactions for the procedure used in the test for nitrate ions. 3 NO3-(aq) + 8 Al(s) + 5 OH-(aq) + 18 H2O(l)->.
How many 10 liter helium balloons could be filled from the tank assuming no change in the temp and a pressure in the balloons of 1.05 atm?